/* =========================================================================
   学多帮 · 学习平台视觉系统（在线学习 / 任务悬赏 / 就业保障）
   说明：所有类名以 pf- 前缀，避免与 old style.css 冲突；
        本文件在 style.css 之后加载，负责"更大气"的版式与组件。
   ========================================================================= */

:root {
    --pf-ink-950: #050a15;
    --pf-ink-900: #08101f;
    --pf-ink-800: #0d1730;
    --pf-ink-700: #16233f;
    --pf-blue: #2563eb;
    --pf-blue-600: #1d4ed8;
    --pf-sky: #38bdf8;
    --pf-violet: #7c5cff;
    --pf-gold: #ffb020;
    --pf-gold-2: #ff8a00;
    --pf-mint: #22d3a6;
    --pf-rose: #ff5d8f;
    --pf-paper: #f5f7fc;
    --pf-line: #e6ecf7;
    --pf-text: #16233f;
    --pf-muted: #6b7c93;
    --pf-radius: 18px;
    --pf-radius-sm: 12px;
    --pf-shadow: 0 16px 44px rgba(13, 23, 48, .10);
    --pf-shadow-lg: 0 30px 80px rgba(13, 23, 48, .18);
    --pf-grad-blue: linear-gradient(135deg, #2563eb 0%, #38bdf8 100%);
    --pf-grad-violet: linear-gradient(135deg, #7c5cff 0%, #4f8cff 100%);
    --pf-grad-gold: linear-gradient(135deg, #ffb020 0%, #ff7a00 100%);
    --pf-grad-dark: linear-gradient(160deg, #08101f 0%, #101d3a 55%, #0a1930 100%);
}

/* ---------- 基础容器与标题 ---------- */
.pf-container { max-width: 1260px; margin: 0 auto; padding: 0 24px; }
.pf-container-narrow { max-width: 1040px; }

.pf-section { padding: 88px 0; position: relative; }
.pf-section-tight { padding: 60px 0; }
.pf-section-paper { background: var(--pf-paper); }
.pf-section-dark { background: var(--pf-grad-dark); color: #e8eeff; }

.pf-head { text-align: center; max-width: 780px; margin: 0 auto 52px; }
.pf-head-left { text-align: left; margin-left: 0; }
.pf-kicker {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 12px; font-weight: 700; letter-spacing: 2.4px; text-transform: uppercase;
    color: var(--pf-blue); background: rgba(37, 99, 235, .10);
    border: 1px solid rgba(37, 99, 235, .18);
    padding: 7px 16px; border-radius: 999px; margin-bottom: 18px;
}
.pf-section-dark .pf-kicker { color: #8ec5ff; background: rgba(56, 189, 248, .10); border-color: rgba(56, 189, 248, .22); }
.pf-head h2 {
    font-size: clamp(28px, 3.4vw, 44px); line-height: 1.2; letter-spacing: -.5px;
    margin: 0 0 14px; color: var(--pf-text); font-weight: 800;
}
.pf-section-dark .pf-head h2, .pf-head-dark h2 { color: #fff; }
.pf-head h2 .hl { background: var(--pf-grad-blue); -webkit-background-clip: text; background-clip: text; color: transparent; }
.pf-head h2 .hl-gold { background: var(--pf-grad-gold); -webkit-background-clip: text; background-clip: text; color: transparent; }
.pf-head p { margin: 0; color: var(--pf-muted); font-size: 16px; line-height: 1.85; }
.pf-section-dark .pf-head p { color: rgba(232, 238, 255, .70); }
.pf-head-row { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; text-align: left; max-width: none; margin-bottom: 44px; }
.pf-head-row p { max-width: 620px; }

/* ---------- 按钮 ---------- */
.pf-btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    height: 48px; padding: 0 26px; border-radius: 10px;
    font-size: 15px; font-weight: 600; line-height: 1; cursor: pointer;
    border: 1px solid transparent; transition: all .22s ease; white-space: nowrap;
}
.pf-btn-primary { background: var(--pf-grad-blue); color: #fff; box-shadow: 0 10px 24px rgba(37, 99, 235, .28); }
.pf-btn-primary:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 16px 34px rgba(37, 99, 235, .38); }
.pf-btn-gold { background: var(--pf-grad-gold); color: #2a1500; box-shadow: 0 10px 26px rgba(255, 138, 0, .32); }
.pf-btn-gold:hover { color: #2a1500; transform: translateY(-2px); box-shadow: 0 18px 38px rgba(255, 138, 0, .42); }
.pf-btn-dark { background: #101d3a; color: #fff; }
.pf-btn-dark:hover { background: #16233f; color: #fff; transform: translateY(-2px); }
.pf-btn-ghost { background: rgba(255, 255, 255, .06); color: #fff; border-color: rgba(255, 255, 255, .22); backdrop-filter: blur(6px); }
.pf-btn-ghost:hover { background: rgba(255, 255, 255, .14); color: #fff; border-color: rgba(255, 255, 255, .4); }
.pf-btn-outline { background: #fff; color: var(--pf-blue); border-color: rgba(37, 99, 235, .28); }
.pf-btn-outline:hover { background: rgba(37, 99, 235, .06); color: var(--pf-blue-600); border-color: var(--pf-blue); }
.pf-btn-sm { height: 38px; padding: 0 18px; font-size: 13px; border-radius: 8px; }
.pf-btn-lg { height: 56px; padding: 0 34px; font-size: 16px; border-radius: 12px; }
.pf-btn-block { width: 100%; }
.pf-btn[disabled] { opacity: .55; cursor: not-allowed; transform: none !important; box-shadow: none !important; }

.pf-link-arrow { display: inline-flex; align-items: center; gap: 6px; font-weight: 600; color: var(--pf-blue); font-size: 14px; }
.pf-link-arrow:hover { gap: 10px; color: var(--pf-blue-600); }

/* ---------- 徽标 / 标签 ---------- */
.pf-chip { display: inline-flex; align-items: center; gap: 6px; height: 30px; padding: 0 13px; border-radius: 999px; font-size: 12px; font-weight: 600; background: #eef3ff; color: #2350c8; }
.pf-chip-soft { background: rgba(37, 99, 235, .08); color: #2350c8; }
.pf-chip-gold { background: rgba(255, 176, 32, .14); color: #a35c00; }
.pf-chip-mint { background: rgba(34, 211, 166, .14); color: #0b7a5f; }
.pf-chip-dark { background: rgba(255, 255, 255, .10); color: #cfe0ff; border: 1px solid rgba(255, 255, 255, .16); }
.pf-tag { display: inline-block; padding: 4px 10px; border-radius: 6px; background: #f2f5fb; color: #5b6b84; font-size: 12px; line-height: 1.5; }
.pf-tag + .pf-tag { margin-left: 6px; }

/* =========================================================================
   一、首页 Hero
   ========================================================================= */
.pf-hero {
    position: relative; overflow: hidden;
    background: var(--pf-grad-dark);
    color: #fff;
    padding: 76px 0 132px;
    isolation: isolate;
}
.pf-hero::before {
    content: ''; position: absolute; inset: 0; z-index: -1;
    background:
        radial-gradient(620px 420px at 82% 12%, rgba(56, 189, 248, .26), transparent 62%),
        radial-gradient(560px 460px at 12% 88%, rgba(124, 92, 255, .26), transparent 65%),
        radial-gradient(420px 320px at 52% 4%, rgba(255, 176, 32, .12), transparent 70%);
}
.pf-hero::after {
    content: ''; position: absolute; inset: 0; z-index: -1; opacity: .5;
    background-image:
        linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px);
    background-size: 64px 64px;
    mask-image: radial-gradient(circle at 50% 32%, #000 0%, transparent 74%);
    -webkit-mask-image: radial-gradient(circle at 50% 32%, #000 0%, transparent 74%);
}
.pf-hero-inner { display: grid; grid-template-columns: 1.08fr .92fr; gap: 48px; align-items: center; }
.pf-eyebrow {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 8px 16px; border-radius: 999px; font-size: 13px; font-weight: 600;
    background: rgba(255, 255, 255, .07); border: 1px solid rgba(255, 255, 255, .16);
    color: #d6e5ff; backdrop-filter: blur(8px);
}
.pf-eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--pf-mint); box-shadow: 0 0 0 4px rgba(34, 211, 166, .18); }
.pf-hero h1 {
    margin: 22px 0 18px;
    font-size: clamp(38px, 5vw, 66px);
    line-height: 1.1; font-weight: 800; letter-spacing: -1.6px; color: #fff;
}
.pf-hero h1 .hl { background: linear-gradient(120deg, #7dd3fc 0%, #a5b4fc 100%); -webkit-background-clip: text; background-clip: text; color: transparent; }
.pf-hero h1 .hl-gold { background: linear-gradient(120deg, #ffd166 0%, #ff9f1c 100%); -webkit-background-clip: text; background-clip: text; color: transparent; position: relative; }
.pf-hero-sub { font-size: 17px; line-height: 1.9; color: rgba(226, 236, 255, .74); max-width: 560px; margin: 0 0 30px; }
.pf-hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.pf-hero-trust { display: flex; align-items: center; gap: 18px; margin-top: 30px; color: rgba(214, 229, 255, .72); font-size: 13px; flex-wrap: wrap; }
.pf-avatars { display: flex; }
.pf-avatars span {
    width: 34px; height: 34px; border-radius: 50%; margin-left: -10px;
    display: flex; align-items: center; justify-content: center;
    font-size: 12px; font-weight: 700; color: #0b1730;
    background: linear-gradient(135deg, #93c5fd, #7dd3fc);
    border: 2px solid #0b1428;
}
.pf-avatars span:first-child { margin-left: 0; }
.pf-avatars span:nth-child(2) { background: linear-gradient(135deg, #fcd34d, #fbbf24); }
.pf-avatars span:nth-child(3) { background: linear-gradient(135deg, #c4b5fd, #a78bfa); }
.pf-avatars span:nth-child(4) { background: linear-gradient(135deg, #6ee7b7, #34d399); }
.pf-hero-stats { display: grid; grid-template-columns: repeat(4, auto); gap: 38px; margin-top: 40px; padding-top: 30px; border-top: 1px solid rgba(255, 255, 255, .12); }
.pf-hero-stats b { display: block; font-size: 34px; font-weight: 800; letter-spacing: -1px; color: #fff; line-height: 1.1; }
.pf-hero-stats b small { font-size: 15px; font-weight: 600; margin-left: 2px; color: #8ec5ff; }
.pf-hero-stats span { font-size: 13px; color: rgba(214, 229, 255, .62); }

/* Hero 右侧浮层卡 */
.pf-hero-visual { position: relative; min-height: 460px; }
.pf-glow { position: absolute; inset: 8% 0 12% 10%; background: radial-gradient(circle at 55% 45%, rgba(56, 189, 248, .35), transparent 62%); filter: blur(24px); }
.pf-card {
    position: absolute; background: rgba(255, 255, 255, .08);
    border: 1px solid rgba(255, 255, 255, .18);
    border-radius: 18px; backdrop-filter: blur(18px);
    box-shadow: 0 26px 60px rgba(0, 0, 0, .35);
    color: #eaf2ff;
}
.pf-card-progress { top: 6px; left: 0; width: 320px; padding: 20px; animation: pfFloat 7s ease-in-out infinite; }
.pf-card-head { display: flex; align-items: center; justify-content: space-between; font-size: 12px; color: rgba(226, 236, 255, .68); margin-bottom: 14px; }
.pf-ring {
    --p: 72;
    width: 84px; height: 84px; border-radius: 50%; flex-shrink: 0;
    background: conic-gradient(#7dd3fc calc(var(--p) * 1%), rgba(255, 255, 255, .12) 0);
    display: flex; align-items: center; justify-content: center; position: relative;
}
.pf-ring::before { content: ''; position: absolute; inset: 7px; border-radius: 50%; background: #0d1b35; }
.pf-ring b { position: relative; font-size: 20px; font-weight: 800; color: #fff; }
.pf-progress-row { display: flex; align-items: center; gap: 16px; }
.pf-progress-row .t { font-size: 14px; font-weight: 700; color: #fff; margin-bottom: 4px; }
.pf-progress-row .s { font-size: 12px; color: rgba(214, 229, 255, .62); line-height: 1.6; }
.pf-card-bounty { top: 168px; right: -6px; width: 250px; padding: 18px; animation: pfFloat 8.5s ease-in-out infinite reverse; background: linear-gradient(150deg, rgba(255, 176, 32, .22), rgba(255, 122, 0, .10)); border-color: rgba(255, 176, 32, .38); }
.pf-card-bounty .label { font-size: 12px; letter-spacing: 1px; color: #ffd166; font-weight: 700; }
.pf-card-bounty .amount { font-size: 34px; font-weight: 800; color: #fff; line-height: 1.2; margin: 4px 0; }
.pf-card-bounty .amount small { font-size: 14px; font-weight: 600; color: #ffd166; }
.pf-card-bounty .desc { font-size: 12px; color: rgba(255, 236, 200, .78); line-height: 1.6; }
.pf-card-offer { bottom: 4px; left: 34px; width: 300px; padding: 18px; display: flex; gap: 14px; align-items: center; animation: pfFloat 9.5s ease-in-out infinite; }
.pf-offer-logo { width: 46px; height: 46px; border-radius: 12px; background: var(--pf-grad-blue); display: flex; align-items: center; justify-content: center; font-size: 20px; flex-shrink: 0; }
.pf-card-offer .t { font-size: 14px; font-weight: 700; color: #fff; }
.pf-card-offer .s { font-size: 12px; color: rgba(214, 229, 255, .66); }
.pf-card-offer .pay { font-size: 13px; font-weight: 700; color: #7dffcf; margin-left: auto; }

@keyframes pfFloat { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-14px); } }

/* 三入口条（压在 Hero 上） */
.pf-lanes { position: relative; margin-top: -72px; z-index: 5; }
.pf-lane-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.pf-lane {
    background: #fff; border-radius: var(--pf-radius); padding: 26px 24px;
    box-shadow: var(--pf-shadow); display: flex; gap: 16px; align-items: flex-start;
    border: 1px solid rgba(230, 236, 247, .9); transition: all .25s ease; color: var(--pf-text);
}
.pf-lane:hover { transform: translateY(-6px); box-shadow: var(--pf-shadow-lg); border-color: rgba(37, 99, 235, .28); color: var(--pf-text); }
.pf-lane-icon { width: 52px; height: 52px; border-radius: 14px; display: flex; align-items: center; justify-content: center; font-size: 24px; flex-shrink: 0; background: rgba(37, 99, 235, .1); }
.pf-lane:nth-child(2) .pf-lane-icon { background: rgba(255, 176, 32, .16); }
.pf-lane:nth-child(3) .pf-lane-icon { background: rgba(34, 211, 166, .16); }
.pf-lane h3 { margin: 2px 0 6px; font-size: 17px; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.pf-lane p { margin: 0; font-size: 13px; color: var(--pf-muted); line-height: 1.65; }
.pf-lane .pf-lane-arrow { margin-left: auto; color: #b7c3d6; font-size: 20px; align-self: center; }
.pf-lane:hover .pf-lane-arrow { color: var(--pf-blue); }

/* =========================================================================
   二、在线学习板块
   ========================================================================= */
.pf-learn-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 52px; align-items: center; }
.pf-player-mock {
    background: linear-gradient(165deg, #0b1428 0%, #142445 100%);
    border-radius: 20px; padding: 16px; box-shadow: var(--pf-shadow-lg);
    border: 1px solid rgba(255, 255, 255, .08); position: relative; overflow: hidden;
}
.pf-player-mock::after { content: ''; position: absolute; inset: 0; pointer-events: none; background: radial-gradient(420px 220px at 80% 0%, rgba(56, 189, 248, .18), transparent 70%); }
.pf-player-screen {
    aspect-ratio: 16 / 9; border-radius: 12px; position: relative; overflow: hidden;
    background:
        radial-gradient(480px 260px at 30% 20%, rgba(124, 92, 255, .45), transparent 64%),
        radial-gradient(420px 300px at 80% 80%, rgba(37, 99, 235, .5), transparent 66%),
        #08142a;
    border: 1px solid rgba(255, 255, 255, .08);
    display: flex; align-items: center; justify-content: center;
}
.pf-player-screen .play {
    width: 74px; height: 74px; border-radius: 50%; background: rgba(255, 255, 255, .12);
    border: 1px solid rgba(255, 255, 255, .28); backdrop-filter: blur(6px);
    display: flex; align-items: center; justify-content: center; color: #fff; font-size: 26px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, .35); transition: all .2s;
}
.pf-player-screen:hover .play { transform: scale(1.08); background: rgba(255, 255, 255, .2); }
.pf-player-screen .label { position: absolute; left: 18px; bottom: 54px; color: #fff; }
.pf-player-screen .label small { display: block; font-size: 11px; letter-spacing: 2px; color: rgba(255, 255, 255, .6); }
.pf-player-screen .label b { font-size: 19px; font-weight: 700; }
.pf-player-bar { position: absolute; left: 18px; right: 18px; bottom: 18px; height: 4px; border-radius: 4px; background: rgba(255, 255, 255, .18); overflow: hidden; }
.pf-player-bar i { display: block; height: 100%; width: 42%; background: linear-gradient(90deg, #38bdf8, #7c5cff); border-radius: 4px; }
.pf-player-list { margin-top: 14px; background: rgba(255, 255, 255, .03); border: 1px solid rgba(255, 255, 255, .07); border-radius: 12px; overflow: hidden; }
.pf-player-list .row { display: flex; align-items: center; gap: 12px; padding: 11px 16px; font-size: 13px; color: rgba(226, 236, 255, .78); border-top: 1px solid rgba(255, 255, 255, .05); }
.pf-player-list .row:first-child { border-top: 0; }
.pf-player-list .row i { font-style: normal; width: 22px; height: 22px; border-radius: 50%; background: rgba(56, 189, 248, .16); color: #7dd3fc; display: flex; align-items: center; justify-content: center; font-size: 11px; flex-shrink: 0; }
.pf-player-list .row.active { background: rgba(56, 189, 248, .10); color: #fff; }
.pf-player-list .row.active i { background: #7dd3fc; color: #0b1428; }
.pf-player-list .row span { margin-left: auto; font-size: 12px; color: rgba(214, 229, 255, .45); }

.pf-feature-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 22px; }
.pf-feature-list li { display: flex; gap: 16px; }
.pf-feature-list .ic {
    width: 46px; height: 46px; border-radius: 13px; flex-shrink: 0;
    display: flex; align-items: center; justify-content: center; font-size: 21px;
    background: #fff; box-shadow: 0 8px 22px rgba(13, 23, 48, .08); border: 1px solid var(--pf-line);
}
.pf-feature-list h4 { margin: 0 0 5px; font-size: 16px; font-weight: 700; }
.pf-feature-list p { margin: 0; font-size: 13.5px; color: var(--pf-muted); line-height: 1.75; }
.pf-learn-meta { display: flex; gap: 26px; margin-top: 30px; padding-top: 22px; border-top: 1px dashed var(--pf-line); }
.pf-learn-meta b { display: block; font-size: 24px; font-weight: 800; color: var(--pf-blue); letter-spacing: -.5px; }
.pf-learn-meta span { font-size: 12.5px; color: var(--pf-muted); }

/* =========================================================================
   三、学的好处 / 收益
   ========================================================================= */
.pf-benefit-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.pf-benefit {
    background: #fff; border: 1px solid var(--pf-line); border-radius: var(--pf-radius);
    padding: 30px 26px; position: relative; overflow: hidden; transition: all .28s ease;
}
.pf-benefit::after {
    content: ''; position: absolute; right: -60px; top: -60px; width: 150px; height: 150px;
    border-radius: 50%; background: radial-gradient(circle, rgba(37, 99, 235, .12), transparent 70%);
    transition: transform .35s ease;
}
.pf-benefit:hover { transform: translateY(-6px); box-shadow: var(--pf-shadow); border-color: rgba(37, 99, 235, .26); }
.pf-benefit:hover::after { transform: scale(1.35); }
.pf-benefit .no { font-size: 13px; font-weight: 800; letter-spacing: 2px; color: rgba(37, 99, 235, .55); }
.pf-benefit .ic { font-size: 34px; line-height: 1; margin: 14px 0 14px; }
.pf-benefit h3 { margin: 0 0 8px; font-size: 18px; font-weight: 700; }
.pf-benefit p { margin: 0; color: var(--pf-muted); font-size: 13.5px; line-height: 1.8; }
.pf-benefit .kpi { margin-top: 16px; font-size: 13px; color: #0b7a5f; background: rgba(34, 211, 166, .1); border-radius: 8px; padding: 7px 12px; display: inline-block; font-weight: 600; }

.pf-salary {
    margin-top: 44px; background: #fff; border: 1px solid var(--pf-line); border-radius: var(--pf-radius);
    padding: 34px 34px 30px; box-shadow: var(--pf-shadow);
}
.pf-salary-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 20px; margin-bottom: 26px; flex-wrap: wrap; }
.pf-salary-head h3 { margin: 0; font-size: 21px; font-weight: 700; }
.pf-salary-head p { margin: 6px 0 0; color: var(--pf-muted); font-size: 13px; }
.pf-salary-bars { display: grid; gap: 18px; }
.pf-salary-item { display: grid; grid-template-columns: 150px 1fr 92px; align-items: center; gap: 16px; }
.pf-salary-item .name { font-size: 13.5px; color: var(--pf-text); font-weight: 600; }
.pf-salary-track { height: 26px; background: #f1f5fb; border-radius: 8px; overflow: hidden; position: relative; }
.pf-salary-track i { display: block; height: 100%; border-radius: 8px; background: var(--pf-grad-blue); position: relative; transform-origin: left center; }
.pf-salary-item.before .pf-salary-track i { background: linear-gradient(90deg, #cbd5e1, #e2e8f0); }
.pf-salary-item.after .pf-salary-track i { background: var(--pf-grad-gold); }
.pf-salary-item .val { font-size: 15px; font-weight: 800; color: var(--pf-text); text-align: right; }
.pf-salary-item.after .val { color: #c26800; }
.pf-salary-legend { display: flex; gap: 18px; margin-top: 22px; padding-top: 18px; border-top: 1px dashed var(--pf-line); font-size: 12px; color: var(--pf-muted); }
.pf-salary-legend i { display: inline-block; width: 22px; height: 8px; border-radius: 4px; margin-right: 6px; vertical-align: middle; }

/* =========================================================================
   四、包就业保障
   ========================================================================= */
.pf-guarantee { position: relative; overflow: hidden; background: var(--pf-grad-dark); color: #e8eeff; }
.pf-guarantee::before {
    content: ''; position: absolute; inset: 0;
    background:
        radial-gradient(600px 400px at 88% 0%, rgba(255, 176, 32, .20), transparent 62%),
        radial-gradient(560px 420px at 4% 100%, rgba(37, 99, 235, .28), transparent 65%);
}
.pf-guarantee > * { position: relative; }
.pf-guarantee-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 52px; align-items: center; }
.pf-seal {
    width: 210px; height: 210px; border-radius: 50%; margin: 0 auto; position: relative;
    background: radial-gradient(circle at 30% 25%, #ffd166, #ff9f1c 55%, #c26800 100%);
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    color: #2a1500; box-shadow: 0 30px 70px rgba(255, 138, 0, .35), inset 0 0 0 8px rgba(255, 255, 255, .28);
}
.pf-seal::after { content: ''; position: absolute; inset: -16px; border-radius: 50%; border: 1px dashed rgba(255, 209, 102, .5); animation: pfSpin 26s linear infinite; }
.pf-seal b { font-size: 46px; font-weight: 800; line-height: 1; letter-spacing: -2px; }
.pf-seal span { font-size: 13px; font-weight: 700; margin-top: 6px; letter-spacing: 1px; }
.pf-seal em { font-size: 11px; font-style: normal; margin-top: 4px; opacity: .75; }
@keyframes pfSpin { to { transform: rotate(360deg); } }

.pf-promise-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 28px; }
.pf-promise {
    background: rgba(255, 255, 255, .05); border: 1px solid rgba(255, 255, 255, .12);
    border-radius: 14px; padding: 20px 18px; backdrop-filter: blur(6px);
}
.pf-promise b { display: block; font-size: 17px; color: #fff; margin-bottom: 6px; }
.pf-promise span { font-size: 12.5px; color: rgba(226, 236, 255, .66); line-height: 1.7; display: block; }
.pf-guarantee-stats { display: flex; gap: 36px; margin-top: 30px; flex-wrap: wrap; }
.pf-guarantee-stats b { display: block; font-size: 30px; font-weight: 800; color: #ffd166; letter-spacing: -1px; }
.pf-guarantee-stats span { font-size: 12px; color: rgba(226, 236, 255, .6); }

.pf-job-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.pf-job-card {
    background: #fff; border: 1px solid var(--pf-line); border-radius: 14px; padding: 22px;
    transition: all .25s ease; display: flex; flex-direction: column; gap: 10px; color: var(--pf-text);
}
.pf-job-card:hover { transform: translateY(-5px); box-shadow: var(--pf-shadow); border-color: rgba(37, 99, 235, .25); color: var(--pf-text); }
.pf-job-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 10px; }
.pf-job-top h3 { margin: 0; font-size: 16px; font-weight: 700; line-height: 1.4; }
.pf-job-sal { font-size: 17px; font-weight: 800; color: #ff6b35; white-space: nowrap; }
.pf-job-company { font-size: 13px; color: var(--pf-muted); display: flex; align-items: center; gap: 8px; }
.pf-job-company .logo { width: 24px; height: 24px; border-radius: 7px; background: var(--pf-grad-blue); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 11px; font-weight: 700; }
.pf-job-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; }
.pf-job-card .pf-job-foot { display: flex; justify-content: space-between; align-items: center; padding-top: 12px; border-top: 1px dashed var(--pf-line); font-size: 12px; color: var(--pf-muted); }
.pf-job-guard { font-size: 11px; font-weight: 700; color: #0b7a5f; background: rgba(34, 211, 166, .12); padding: 3px 8px; border-radius: 5px; }

/* =========================================================================
   五、任务悬赏
   ========================================================================= */
.pf-task-hero { background: var(--pf-grad-dark); color: #fff; position: relative; overflow: hidden; padding: 54px 0 64px; }
.pf-task-hero::before {
    content: ''; position: absolute; inset: 0;
    background:
        radial-gradient(560px 360px at 88% 10%, rgba(255, 176, 32, .22), transparent 62%),
        radial-gradient(480px 360px at 10% 90%, rgba(56, 189, 248, .2), transparent 65%);
}
.pf-task-hero > * { position: relative; }
.pf-task-hero h1 { font-size: clamp(30px, 4vw, 46px); font-weight: 800; letter-spacing: -1px; margin: 16px 0 12px; color: #fff; }
.pf-task-hero p { color: rgba(226, 236, 255, .72); max-width: 620px; margin: 0 0 26px; font-size: 15.5px; line-height: 1.85; }
.pf-task-hero-stats { display: flex; gap: 40px; flex-wrap: wrap; margin-top: 32px; padding-top: 26px; border-top: 1px solid rgba(255, 255, 255, .12); }
.pf-task-hero-stats b { display: block; font-size: 32px; font-weight: 800; color: #ffd166; letter-spacing: -1px; }
.pf-task-hero-stats span { font-size: 12.5px; color: rgba(226, 236, 255, .62); }

.pf-filter-bar {
    display: flex; flex-wrap: wrap; gap: 10px; align-items: center;
    background: #fff; border: 1px solid var(--pf-line); border-radius: 14px;
    padding: 14px 16px; margin-bottom: 28px; box-shadow: 0 6px 20px rgba(13, 23, 48, .04);
}
.pf-filter-bar .pf-tab {
    padding: 8px 16px; border-radius: 9px; font-size: 13.5px; font-weight: 600;
    color: #5b6b84; background: #f4f7fc; transition: all .2s;
}
.pf-filter-bar .pf-tab:hover { background: #e8effd; color: var(--pf-blue); }
.pf-filter-bar .pf-tab.active { background: var(--pf-blue); color: #fff; box-shadow: 0 6px 16px rgba(37, 99, 235, .25); }
.pf-filter-bar .sp { flex: 1; }
.pf-search { display: flex; gap: 8px; align-items: center; }
.pf-search input {
    height: 40px; border: 1px solid var(--pf-line); border-radius: 9px; padding: 0 14px;
    font-size: 13.5px; min-width: 200px; outline: none; transition: all .2s; background: #fafcff;
}
.pf-search input:focus { border-color: var(--pf-blue); box-shadow: 0 0 0 3px rgba(37, 99, 235, .1); background: #fff; }

.pf-task-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.pf-task-card {
    background: #fff; border: 1px solid var(--pf-line); border-radius: var(--pf-radius);
    padding: 22px 22px 18px; display: flex; flex-direction: column; gap: 12px;
    position: relative; overflow: hidden; transition: all .26s ease;
}
.pf-task-card::before {
    content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
    background: var(--cat-color, var(--pf-blue));
}
.pf-task-card:hover { transform: translateY(-6px); box-shadow: var(--pf-shadow); border-color: rgba(37, 99, 235, .22); }
.pf-task-top { display: flex; align-items: center; gap: 8px; }
.pf-task-cat { font-size: 12px; font-weight: 700; color: var(--cat-color, var(--pf-blue)); display: inline-flex; align-items: center; gap: 5px; }
.pf-task-flag { margin-left: auto; font-size: 11px; font-weight: 700; padding: 3px 8px; border-radius: 5px; background: rgba(255, 93, 143, .12); color: #d6306a; }
.pf-task-flag.urgent { background: rgba(255, 107, 53, .12); color: #d9531e; }
.pf-task-card h3 { margin: 0; font-size: 17px; font-weight: 700; line-height: 1.45; }
.pf-task-card h3 a { color: var(--pf-text); }
.pf-task-card h3 a:hover { color: var(--pf-blue); }
.pf-task-card .sub { margin: 0; font-size: 13px; color: var(--pf-muted); line-height: 1.65; min-height: 42px; }
.pf-task-reward { display: flex; align-items: baseline; gap: 8px; margin-top: 2px; }
.pf-task-reward small { font-size: 11px; color: var(--pf-muted); letter-spacing: 1px; }
.pf-task-reward b { font-size: 27px; font-weight: 800; color: #ff7a00; letter-spacing: -.6px; line-height: 1; }
.pf-task-reward em { font-style: normal; font-size: 12px; font-weight: 700; color: #0b7a5f; background: rgba(34, 211, 166, .12); padding: 3px 8px; border-radius: 5px; }
.pf-task-foot { display: flex; justify-content: space-between; font-size: 12px; color: var(--pf-muted); padding-top: 12px; border-top: 1px dashed var(--pf-line); }
.pf-task-bar { height: 5px; background: #eef2f9; border-radius: 4px; overflow: hidden; }
.pf-task-bar i { display: block; height: 100%; background: var(--pf-grad-blue); border-radius: 4px; }
.pf-task-card .pf-task-cta { display: flex; gap: 8px; margin-top: 4px; }
.pf-task-card .pf-task-cta .pf-btn { flex: 1; }

/* 任务列表（横排） */
.pf-task-list { display: grid; gap: 14px; }
.pf-task-row {
    display: grid; grid-template-columns: 1fr 190px; gap: 22px; align-items: center;
    background: #fff; border: 1px solid var(--pf-line); border-radius: 14px; padding: 20px 24px;
    transition: all .22s ease; position: relative; overflow: hidden;
}
.pf-task-row::before { content: ''; position: absolute; left: 0; top: 0; bottom: 0; width: 4px; background: var(--cat-color, var(--pf-blue)); }
.pf-task-row:hover { transform: translateX(3px); box-shadow: 0 14px 34px rgba(13, 23, 48, .08); border-color: rgba(37, 99, 235, .2); }
.pf-task-row h3 { margin: 6px 0 6px; font-size: 17px; font-weight: 700; }
.pf-task-row h3 a { color: var(--pf-text); }
.pf-task-row h3 a:hover { color: var(--pf-blue); }
.pf-task-row .sub { margin: 0 0 10px; font-size: 13px; color: var(--pf-muted); }
.pf-task-row .tags { display: flex; flex-wrap: wrap; gap: 6px; }
.pf-task-row-side { text-align: right; border-left: 1px dashed var(--pf-line); padding-left: 22px; }
.pf-task-row-side .amount { font-size: 26px; font-weight: 800; color: #ff7a00; line-height: 1.1; }
.pf-task-row-side .amount small { font-size: 12px; color: var(--pf-muted); font-weight: 500; }
.pf-task-row-side .meta { font-size: 12px; color: var(--pf-muted); margin: 6px 0 12px; }

/* 侧栏 */
.pf-side-card { background: #fff; border: 1px solid var(--pf-line); border-radius: 14px; padding: 22px; margin-bottom: 18px; }
.pf-side-card h4 { margin: 0 0 14px; font-size: 15px; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.pf-rank { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; }
.pf-rank li { display: flex; align-items: center; gap: 10px; font-size: 13px; }
.pf-rank .no { width: 20px; height: 20px; border-radius: 6px; background: #f1f5fb; color: #7c8aa3; font-size: 11px; font-weight: 800; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.pf-rank li:nth-child(1) .no { background: var(--pf-grad-gold); color: #2a1500; }
.pf-rank li:nth-child(2) .no { background: #e2e8f0; color: #475569; }
.pf-rank li:nth-child(3) .no { background: #fde8d3; color: #b45309; }
.pf-rank .nm { flex: 1; color: var(--pf-text); font-weight: 600; }
.pf-rank .pt { color: #ff7a00; font-weight: 700; }

.pf-cta-card { background: var(--pf-grad-blue); color: #fff; border-radius: 14px; padding: 24px; text-align: center; }
.pf-cta-card h4 { margin: 0 0 8px; font-size: 17px; color: #fff; }
.pf-cta-card p { margin: 0 0 16px; font-size: 12.5px; color: rgba(255, 255, 255, .78); line-height: 1.7; }

/* =========================================================================
   六、任务详情
   ========================================================================= */
.pf-detail-grid { display: grid; grid-template-columns: 1fr 360px; gap: 28px; align-items: start; }
.pf-panel { background: #fff; border: 1px solid var(--pf-line); border-radius: var(--pf-radius); padding: 28px; margin-bottom: 20px; }
.pf-panel-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 18px; }
.pf-panel-head h2 { margin: 0; font-size: 20px; font-weight: 700; }
.pf-panel h2.pf-h { font-size: 20px; margin: 0 0 16px; }
.pf-detail-title { margin: 8px 0 12px; font-size: clamp(24px, 3vw, 32px); font-weight: 800; line-height: 1.3; letter-spacing: -.5px; }
.pf-detail-sub { color: var(--pf-muted); font-size: 15px; margin: 0 0 18px; }
.pf-detail-meta { display: flex; flex-wrap: wrap; gap: 10px; }
.pf-rich { font-size: 14.5px; line-height: 1.9; color: #33415c; }
.pf-rich p { margin: 0 0 14px; }
.pf-rich ul, .pf-rich ol { padding-left: 22px; margin: 0 0 16px; }
.pf-rich li { margin-bottom: 8px; }
.pf-rich h3, .pf-rich h4 { margin: 22px 0 10px; font-size: 16.5px; color: var(--pf-text); }

.pf-reward-box { background: linear-gradient(150deg, #fffaf0 0%, #fff 60%); border: 1px solid rgba(255, 176, 32, .35); border-radius: 16px; padding: 24px; margin-bottom: 18px; }
.pf-reward-box .label { font-size: 12px; letter-spacing: 2px; color: #a35c00; font-weight: 700; }
.pf-reward-box .amount { font-size: 42px; font-weight: 800; color: #ff7a00; letter-spacing: -1.5px; line-height: 1.15; margin: 4px 0 2px; }
.pf-reward-box .amount small { font-size: 15px; color: #a35c00; }
.pf-reward-box .extra { font-size: 13px; color: #0b7a5f; font-weight: 700; }
.pf-reward-facts { list-style: none; padding: 0; margin: 18px 0 0; display: grid; gap: 10px; font-size: 13px; color: #4b5b75; }
.pf-reward-facts li { display: flex; justify-content: space-between; gap: 12px; padding-bottom: 9px; border-bottom: 1px dashed #f0e3c9; }
.pf-reward-facts li:last-child { border-bottom: 0; padding-bottom: 0; }
.pf-reward-facts b { color: var(--pf-text); }

.pf-timeline { list-style: none; padding: 0; margin: 0; }
.pf-timeline li { position: relative; padding: 0 0 22px 28px; border-left: 2px solid #e8eef9; }
.pf-timeline li:last-child { border-left-color: transparent; padding-bottom: 0; }
.pf-timeline li::before {
    content: ''; position: absolute; left: -7px; top: 4px; width: 12px; height: 12px;
    border-radius: 50%; background: #fff; border: 3px solid var(--pf-blue);
}
.pf-timeline b { display: block; font-size: 14px; margin-bottom: 3px; }
.pf-timeline span { font-size: 12.5px; color: var(--pf-muted); line-height: 1.7; }

.pf-work-list { display: grid; gap: 12px; }
.pf-work { display: flex; gap: 12px; align-items: flex-start; padding: 14px; background: #fafcff; border: 1px solid var(--pf-line); border-radius: 10px; }
.pf-work .avatar { width: 38px; height: 38px; border-radius: 50%; background: var(--pf-grad-blue); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; flex-shrink: 0; }
.pf-work .nm { font-size: 13.5px; font-weight: 700; }
.pf-work .ds { font-size: 12.5px; color: var(--pf-muted); line-height: 1.65; }
.pf-work .sc { margin-left: auto; font-size: 16px; font-weight: 800; color: #ff7a00; }

.pf-form .pf-field { margin-bottom: 16px; }
.pf-form label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 7px; color: var(--pf-text); }
.pf-form input[type=text], .pf-form input[type=tel], .pf-form input[type=url],
.pf-form input[type=number], .pf-form input[type=date], .pf-form input[type=email],
.pf-form select, .pf-form textarea {
    width: 100%; border: 1px solid var(--pf-line); border-radius: 9px; padding: 11px 13px;
    font-size: 14px; font-family: inherit; color: var(--pf-text); background: #fbfdff;
    transition: all .2s; outline: none;
}
.pf-form textarea { min-height: 110px; resize: vertical; line-height: 1.7; }
.pf-form input:focus, .pf-form select:focus, .pf-form textarea:focus { border-color: var(--pf-blue); background: #fff; box-shadow: 0 0 0 3px rgba(37, 99, 235, .1); }
.pf-form .hint { font-size: 12px; color: var(--pf-muted); margin-top: 6px; }
.pf-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.pf-alert { border-radius: 10px; padding: 13px 16px; font-size: 13.5px; margin-bottom: 16px; line-height: 1.7; }
.pf-alert-ok { background: #eafaf4; color: #0b7a5f; border: 1px solid #b6ecd9; }
.pf-alert-err { background: #fdecec; color: #c0392b; border: 1px solid #f5b7b1; }
.pf-alert-info { background: #eef4ff; color: #2350c8; border: 1px solid #c9dbff; }
.pf-alert-warn { background: #fff8e8; color: #a35c00; border: 1px solid #ffe0a3; }

/* =========================================================================
   七、课程学习页
   ========================================================================= */
.pf-learn-hero { background: var(--pf-grad-dark); color: #fff; padding: 26px 0 30px; }
.pf-learn-hero .crumb { font-size: 12.5px; color: rgba(226, 236, 255, .58); display: flex; gap: 8px; flex-wrap: wrap; }
.pf-learn-hero .crumb a { color: rgba(226, 236, 255, .72); }
.pf-learn-hero .crumb a:hover { color: #fff; }
.pf-learn-hero h1 { font-size: clamp(21px, 2.6vw, 29px); margin: 12px 0 10px; font-weight: 800; color: #fff; letter-spacing: -.4px; }
.pf-learn-hero .meta { display: flex; gap: 18px; flex-wrap: wrap; font-size: 12.5px; color: rgba(226, 236, 255, .68); }

.pf-learn-shell { display: grid; grid-template-columns: 1fr 372px; gap: 26px; align-items: start; padding: 26px 0 70px; }
.pf-learn-main { min-width: 0; }
.pf-player-box { background: #0b1428; border-radius: 16px; overflow: hidden; border: 1px solid rgba(255, 255, 255, .07); box-shadow: var(--pf-shadow-lg); }
.pf-video-wrap { position: relative; aspect-ratio: 16 / 9; background: #060d1c; display: flex; align-items: center; justify-content: center; }
.pf-video-wrap video, .pf-video-wrap iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.pf-video-placeholder { text-align: center; color: rgba(226, 236, 255, .7); padding: 20px; }
.pf-video-placeholder .ic {
    width: 78px; height: 78px; margin: 0 auto 16px; border-radius: 50%;
    background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .18);
    display: flex; align-items: center; justify-content: center; font-size: 30px; color: #fff;
}
.pf-video-placeholder b { display: block; font-size: 17px; color: #fff; margin-bottom: 6px; }
.pf-video-placeholder span { font-size: 12.5px; }
.pf-player-tools { display: flex; align-items: center; gap: 12px; padding: 14px 18px; border-top: 1px solid rgba(255, 255, 255, .06); flex-wrap: wrap; }
.pf-player-tools .name { color: #fff; font-size: 14px; font-weight: 600; flex: 1; min-width: 180px; }
.pf-player-tools .pf-btn { height: 38px; font-size: 13px; border-radius: 8px; }
.pf-player-tools .pf-btn-ok { background: rgba(34, 211, 166, .16); border-color: rgba(34, 211, 166, .4); color: #7dffcf; }
.pf-player-tools .pf-btn-ok:hover { background: rgba(34, 211, 166, .28); color: #b6ffe8; }

.pf-article { background: #fff; border: 1px solid var(--pf-line); border-radius: 16px; padding: 30px 34px; margin-top: 20px; }
.pf-article h3 { font-size: 19px; margin: 28px 0 12px; padding-left: 12px; border-left: 4px solid var(--pf-blue); line-height: 1.3; }
.pf-article h3:first-child { margin-top: 0; }
.pf-article h4 { font-size: 15px; margin: 0 0 4px; }
.pf-article p, .pf-article li { font-size: 14.5px; line-height: 1.95; color: #3a4a66; }
.pf-article ul { padding-left: 22px; }
.lesson-article .lesson-points { display: grid; gap: 12px; margin: 18px 0 26px; }
.lesson-article .lesson-point { display: flex; gap: 14px; padding: 16px; background: #f7faff; border: 1px solid #e8eefb; border-radius: 12px; }
.lesson-article .lesson-point .no { font-size: 15px; font-weight: 800; color: var(--pf-blue); background: #fff; border-radius: 8px; width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; box-shadow: 0 3px 10px rgba(37, 99, 235, .1); }
.lesson-article .lesson-tip { background: #fff8e8; border: 1px solid #ffe0a3; border-radius: 10px; padding: 14px 16px; font-size: 13.5px; color: #7a4a00; line-height: 1.8; margin: 20px 0; }

.pf-learn-side { position: sticky; top: 96px; }
.pf-course-card { background: #fff; border: 1px solid var(--pf-line); border-radius: 16px; padding: 20px; margin-bottom: 16px; box-shadow: 0 10px 30px rgba(13, 23, 48, .05); }
.pf-course-card .t { font-size: 14px; font-weight: 700; margin-bottom: 14px; }
.pf-progress-line { height: 8px; border-radius: 6px; background: #eef2f9; overflow: hidden; }
.pf-progress-line i { display: block; height: 100%; border-radius: 6px; background: var(--pf-grad-blue); }
.pf-course-card .stats { display: flex; justify-content: space-between; font-size: 12px; color: var(--pf-muted); margin-top: 9px; }
.pf-outline { background: #fff; border: 1px solid var(--pf-line); border-radius: 16px; overflow: hidden; max-height: 560px; overflow-y: auto; }
.pf-outline-head { padding: 16px 20px; border-bottom: 1px solid var(--pf-line); font-size: 14px; font-weight: 700; display: flex; justify-content: space-between; align-items: center; }
.pf-chapter { border-bottom: 1px solid #f1f5fb; }
.pf-chapter:last-child { border-bottom: 0; }
.pf-chapter-title { padding: 13px 20px; font-size: 13px; font-weight: 700; color: var(--pf-text); display: flex; gap: 10px; align-items: flex-start; background: #fbfcff; }
.pf-chapter-title .no { color: var(--pf-blue); font-weight: 800; flex-shrink: 0; }
.pf-lesson-item { display: flex; gap: 10px; align-items: center; padding: 10px 20px 10px 30px; font-size: 13px; color: #4b5b75; border-top: 1px solid #f5f8fd; line-height: 1.5; }
.pf-lesson-item:hover { background: #f6f9ff; color: var(--pf-blue); }
.pf-lesson-item.active { background: #eef4ff; color: var(--pf-blue); font-weight: 700; }
.pf-lesson-item .st { width: 18px; height: 18px; border-radius: 50%; border: 1.5px solid #cfdaea; display: flex; align-items: center; justify-content: center; font-size: 10px; flex-shrink: 0; color: #fff; }
.pf-lesson-item.done .st { background: var(--pf-mint); border-color: var(--pf-mint); }
.pf-lesson-item .lt { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pf-lesson-item .du { font-size: 11px; color: #9aa6b8; flex-shrink: 0; }
.pf-free-dot { font-size: 10px; font-weight: 700; color: #0b7a5f; background: rgba(34, 211, 166, .14); border-radius: 4px; padding: 1px 5px; flex-shrink: 0; }

.pf-note-box { background: #fff; border: 1px solid var(--pf-line); border-radius: 16px; padding: 24px 28px; margin-top: 20px; }
.pf-note-box h3 { margin: 0 0 12px; font-size: 16px; }
.pf-note-box textarea { width: 100%; min-height: 110px; border: 1px solid var(--pf-line); border-radius: 10px; padding: 12px 14px; font-family: inherit; font-size: 14px; line-height: 1.7; outline: none; }
.pf-note-box textarea:focus { border-color: var(--pf-blue); box-shadow: 0 0 0 3px rgba(37, 99, 235, .1); }

.pf-pager { display: flex; justify-content: space-between; gap: 12px; margin-top: 20px; flex-wrap: wrap; }

.pf-locked {
    background: linear-gradient(150deg, #0b1428, #16233f); color: #fff; border-radius: 16px;
    padding: 44px 34px; text-align: center; margin-top: 20px;
}
.pf-locked .ic { font-size: 42px; margin-bottom: 12px; }
.pf-locked h3 { color: #fff; margin: 0 0 8px; font-size: 20px; }
.pf-locked p { color: rgba(226, 236, 255, .7); font-size: 14px; max-width: 520px; margin: 0 auto 20px; line-height: 1.8; }
.pf-locked .pf-btn + .pf-btn { margin-left: 10px; }

/* =========================================================================
   八、就业保障页
   ========================================================================= */
.pf-guarantee-hero { background: var(--pf-grad-dark); color: #fff; padding: 56px 0 70px; position: relative; overflow: hidden; }
.pf-guarantee-hero::before {
    content: ''; position: absolute; inset: 0;
    background:
        radial-gradient(620px 400px at 85% 12%, rgba(255, 176, 32, .22), transparent 60%),
        radial-gradient(520px 400px at 6% 92%, rgba(37, 99, 235, .3), transparent 65%);
}
.pf-guarantee-hero > * { position: relative; }
.pf-guarantee-hero h1 { font-size: clamp(32px, 4.4vw, 52px); font-weight: 800; letter-spacing: -1.2px; line-height: 1.15; margin: 16px 0 14px; color: #fff; }
.pf-guarantee-hero p.lead { font-size: 16px; color: rgba(226, 236, 255, .74); max-width: 640px; line-height: 1.9; margin: 0 0 28px; }
.pf-step-flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 42px; }
.pf-step {
    background: rgba(255, 255, 255, .05); border: 1px solid rgba(255, 255, 255, .13);
    border-radius: 14px; padding: 22px 20px; position: relative;
}
.pf-step .no { font-size: 12px; font-weight: 800; letter-spacing: 2px; color: #ffd166; }
.pf-step h4 { margin: 8px 0 6px; font-size: 16px; color: #fff; }
.pf-step p { margin: 0; font-size: 12.5px; color: rgba(226, 236, 255, .64); line-height: 1.7; }
.pf-step:not(:last-child)::after { content: '→'; position: absolute; right: -14px; top: 50%; transform: translateY(-50%); color: rgba(255, 255, 255, .3); }

.pf-job-list { display: grid; gap: 14px; }
.pf-job-row {
    display: grid; grid-template-columns: 1fr 200px; gap: 20px; align-items: center;
    background: #fff; border: 1px solid var(--pf-line); border-radius: 14px; padding: 20px 24px; transition: all .22s;
}
.pf-job-row:hover { box-shadow: 0 14px 34px rgba(13, 23, 48, .08); border-color: rgba(37, 99, 235, .22); transform: translateX(3px); }
.pf-job-row h3 { margin: 0 0 6px; font-size: 17px; font-weight: 700; }
.pf-job-row h3 a { color: var(--pf-text); }
.pf-job-row h3 a:hover { color: var(--pf-blue); }
.pf-job-row .co { font-size: 13px; color: var(--pf-muted); display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.pf-job-row .tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; }
.pf-job-row-side { text-align: right; border-left: 1px dashed var(--pf-line); padding-left: 20px; }
.pf-job-row-side .sal { font-size: 20px; font-weight: 800; color: #ff6b35; }
.pf-job-row-side .meta { font-size: 12px; color: var(--pf-muted); margin: 6px 0 10px; }

.pf-partner-grid { display: grid; grid-template-columns: repeat(6, 1fr); gap: 14px; }
.pf-partner {
    background: #fff; border: 1px solid var(--pf-line); border-radius: 12px; padding: 18px 12px;
    text-align: center; transition: all .22s;
}
.pf-partner:hover { transform: translateY(-4px); box-shadow: 0 12px 28px rgba(13, 23, 48, .08); }
.pf-partner .logo { width: 44px; height: 44px; border-radius: 12px; margin: 0 auto 10px; background: var(--pf-grad-blue); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 16px; font-weight: 800; }
.pf-partner b { display: block; font-size: 13px; color: var(--pf-text); }
.pf-partner span { font-size: 11px; color: var(--pf-muted); }

.pf-faq { display: grid; gap: 12px; }
.pf-faq details { background: #fff; border: 1px solid var(--pf-line); border-radius: 12px; padding: 18px 22px; }
.pf-faq summary { cursor: pointer; font-size: 14.5px; font-weight: 700; color: var(--pf-text); list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.pf-faq summary::-webkit-details-marker { display: none; }
.pf-faq summary::after { content: '+'; color: var(--pf-blue); font-size: 20px; line-height: 1; font-weight: 400; }
.pf-faq details[open] summary::after { content: '−'; }
.pf-faq p { margin: 12px 0 0; font-size: 13.5px; color: var(--pf-muted); line-height: 1.85; }

.pf-story-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.pf-story { background: #fff; border: 1px solid var(--pf-line); border-radius: 14px; padding: 24px; position: relative; }
.pf-story .quote { font-size: 13.5px; line-height: 1.9; color: #3a4a66; margin: 10px 0 18px; }
.pf-story .who { display: flex; align-items: center; gap: 12px; border-top: 1px dashed var(--pf-line); padding-top: 14px; }
.pf-story .who .av { width: 40px; height: 40px; border-radius: 50%; background: var(--pf-grad-violet); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 700; }
.pf-story .who b { display: block; font-size: 13.5px; }
.pf-story .who span { font-size: 12px; color: var(--pf-muted); }
.pf-story .offer { font-size: 12px; font-weight: 700; color: #ff6b35; background: rgba(255, 107, 53, .1); padding: 4px 10px; border-radius: 6px; display: inline-block; margin-bottom: 6px; }

/* =========================================================================
   九、通用英雄（内页）
   ========================================================================= */
.pf-page-hero { background: var(--pf-grad-dark); color: #fff; padding: 54px 0 58px; position: relative; overflow: hidden; }
.pf-page-hero::before {
    content: ''; position: absolute; inset: 0;
    background:
        radial-gradient(560px 360px at 82% 6%, rgba(37, 99, 235, .34), transparent 62%),
        radial-gradient(420px 320px at 10% 100%, rgba(124, 92, 255, .28), transparent 65%);
}
.pf-page-hero::after {
    content: ''; position: absolute; inset: 0; opacity: .4;
    background-image: linear-gradient(rgba(255, 255, 255, .05) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, .05) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(circle at 40% 20%, #000, transparent 72%);
    -webkit-mask-image: radial-gradient(circle at 40% 20%, #000, transparent 72%);
}
.pf-page-hero > * { position: relative; }
.pf-page-hero .crumb { font-size: 12.5px; color: rgba(226, 236, 255, .58); display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.pf-page-hero .crumb a { color: rgba(226, 236, 255, .72); }
.pf-page-hero .crumb a:hover { color: #fff; }
.pf-page-hero h1 { font-size: clamp(30px, 4vw, 48px); font-weight: 800; letter-spacing: -1px; line-height: 1.2; margin: 0 0 14px; color: #fff; }
.pf-page-hero .lead { font-size: 15.5px; color: rgba(226, 236, 255, .74); max-width: 660px; line-height: 1.9; margin: 0; }
.pf-page-hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 24px; }

/* =========================================================================
   十、学员中心扩展
   ========================================================================= */
.pf-member-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin: 18px 0; }
.pf-member-stat { background: #fff; border: 1px solid var(--pf-line); border-radius: 12px; padding: 18px; }
.pf-member-stat b { display: block; font-size: 26px; font-weight: 800; color: var(--pf-blue); letter-spacing: -.6px; }
.pf-member-stat span { font-size: 12.5px; color: var(--pf-muted); }
.pf-cert-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.pf-cert {
    border: 1px solid #e8d9b5; background: linear-gradient(150deg, #fffdf7, #fff8e8);
    border-radius: 12px; padding: 20px; position: relative; overflow: hidden;
}
.pf-cert::after { content: 'CERTIFICATE'; position: absolute; right: 12px; bottom: 8px; font-size: 22px; font-weight: 800; letter-spacing: 2px; color: rgba(255, 176, 32, .12); }
.pf-cert .no { font-size: 11px; letter-spacing: 1.4px; color: #a35c00; font-weight: 700; }
.pf-cert h4 { margin: 6px 0 8px; font-size: 15px; }
.pf-cert .meta { font-size: 12px; color: var(--pf-muted); }

/* =========================================================================
   十一、动效与响应式
   ========================================================================= */
.pf-reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
.pf-reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
    .pf-reveal { opacity: 1; transform: none; transition: none; }
    .pf-card-progress, .pf-card-bounty, .pf-card-offer, .pf-seal::after { animation: none !important; }
}

@media (max-width: 1100px) {
    .pf-hero-inner { grid-template-columns: 1fr; gap: 34px; }
    .pf-hero-visual { min-height: 380px; max-width: 560px; }
    .pf-learn-grid, .pf-guarantee-grid { grid-template-columns: 1fr; gap: 34px; }
    .pf-detail-grid, .pf-learn-shell { grid-template-columns: 1fr; }
    .pf-learn-side { position: static; }
    .pf-task-grid, .pf-job-grid, .pf-promise-grid, .pf-benefit-grid, .pf-story-grid { grid-template-columns: repeat(2, 1fr); }
    .pf-partner-grid { grid-template-columns: repeat(4, 1fr); }
    .pf-step-flow { grid-template-columns: repeat(2, 1fr); }
    .pf-step:not(:last-child)::after { display: none; }
}

@media (max-width: 768px) {
    .pf-container { padding: 0 16px; }
    .pf-section { padding: 52px 0; }
    .pf-hero { padding: 48px 0 100px; }
    .pf-hero h1 { font-size: 34px; letter-spacing: -.8px; }
    .pf-hero-sub { font-size: 14.5px; }
    .pf-hero-stats { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .pf-hero-stats b { font-size: 26px; }
    .pf-hero-visual { min-height: 330px; }
    .pf-card-progress { width: 250px; padding: 15px; }
    .pf-ring { width: 66px; height: 66px; }
    .pf-ring b { font-size: 16px; }
    .pf-card-bounty { width: 200px; top: 140px; padding: 14px; }
    .pf-card-bounty .amount { font-size: 25px; }
    .pf-card-offer { width: 232px; left: 0; bottom: 0; padding: 14px; }
    .pf-lanes { margin-top: -56px; }
    .pf-lane-grid, .pf-task-grid, .pf-job-grid, .pf-promise-grid, .pf-benefit-grid,
    .pf-story-grid, .pf-task-hero-stats, .pf-guarantee-stats { grid-template-columns: 1fr; }
    .pf-lane-grid { gap: 12px; }
    .pf-head h2 { font-size: 25px; }
    .pf-head p { font-size: 14px; }
    .pf-head-row { flex-direction: column; align-items: flex-start; }
    .pf-salary-item { grid-template-columns: 110px 1fr 64px; gap: 10px; }
    .pf-salary { padding: 22px 18px; }
    .pf-salary-item .name { font-size: 12.5px; }
    .pf-partner-grid { grid-template-columns: repeat(3, 1fr); }
    .pf-task-row, .pf-job-row { grid-template-columns: 1fr; gap: 14px; }
    .pf-task-row-side, .pf-job-row-side { text-align: left; border-left: 0; border-top: 1px dashed var(--pf-line); padding: 12px 0 0; }
    .pf-article { padding: 20px 16px; }
    .pf-panel { padding: 20px 16px; }
    .pf-form-row { grid-template-columns: 1fr; }
    .pf-member-grid { grid-template-columns: repeat(2, 1fr); }
    .pf-cert-grid { grid-template-columns: 1fr; }
    .pf-filter-bar { padding: 10px; gap: 8px; }
    .pf-filter-bar .pf-tab { padding: 7px 12px; font-size: 12.5px; }
    .pf-search { width: 100%; }
    .pf-search input { flex: 1; min-width: 0; }
    .pf-detail-title { font-size: 23px; }
    .pf-reward-box .amount { font-size: 34px; }
    .pf-step-flow { grid-template-columns: 1fr; }
    .pf-outline { max-height: 420px; }
}

/* =========================================================================
   十二、导航与新入口 / 全站 CTA
   ========================================================================= */
.header .nav > ul > li > a { padding: 0 15px; font-size: 14.5px; }
.header .nav { margin-left: 26px; min-width: 0; }
.header .nav > ul { flex-wrap: nowrap; }
/* Logo / 电话固定宽度，避免导航挤压时中文字符被压成竖排 */
.header .logo { flex: 0 0 auto; }
.header .logo .logo-text { white-space: nowrap; }
.header .header-cta { flex: 0 0 auto; }
.header .header-phone { white-space: nowrap; }
.pf-nav-tag {
    display: inline-block; font-style: normal; font-size: 10px; font-weight: 700;
    line-height: 1; padding: 3px 5px; border-radius: 4px; margin-left: 5px;
    vertical-align: middle; transform: translateY(-1px);
    background: linear-gradient(135deg, #ffb020, #ff7a00); color: #2a1500;
}
.pf-nav-item.active > a { color: var(--pf-blue); }
.pf-nav-item.active > a::after {
    content: ''; position: absolute; bottom: 18px; left: 50%; transform: translateX(-50%);
    width: 22px; height: 3px; background: var(--pf-grad-blue); border-radius: 2px;
}
.pf-nav-item { position: relative; }

.pf-footer-cta { background: var(--pf-grad-dark); color: #fff; padding: 58px 0; position: relative; overflow: hidden; }
.pf-footer-cta::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(520px 300px at 80% 20%, rgba(255, 176, 32, .2), transparent 62%),
                radial-gradient(480px 320px at 8% 90%, rgba(37, 99, 235, .26), transparent 65%);
}
.pf-footer-cta-inner { position: relative; display: flex; align-items: center; justify-content: space-between; gap: 34px; flex-wrap: wrap; }
.pf-footer-cta h2 { color: #fff; font-size: clamp(24px, 3vw, 36px); line-height: 1.35; letter-spacing: -.5px; margin: 14px 0 10px; font-weight: 800; }
.pf-footer-cta p { margin: 0; color: rgba(226, 236, 255, .68); font-size: 14px; }
.pf-footer-cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* 导航按宽度收敛：空间充足时展示全部栏目，仅在超窄屏收起次要入口 */
@media (max-width: 1024px) {
    .header .nav > ul > li > a { padding: 0 10px; font-size: 13.5px; }
}
@media (max-width: 780px) {
    .header .nav > ul > li.nav-cat-about,
    .header .nav > ul > li.nav-cat-news { display: none; }
}
@media (max-width: 768px) {
    .pf-footer-cta { padding: 38px 0; }
    .pf-footer-cta-inner { flex-direction: column; align-items: flex-start; }
    .pf-footer-cta-actions .pf-btn { width: 100%; }
    .header .nav-toggle { margin-left: auto; }
}

/* =========================================================================
   十三、活动卡片（首页品牌位）
   ========================================================================= */
.pf-campaign-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 18px; }
.pf-campaign {
    position: relative; display: flex; align-items: flex-end; min-height: 200px;
    border-radius: 16px; overflow: hidden; color: #fff; padding: 22px;
    background-size: cover; background-position: center; background-color: #0d1730;
    transition: transform .28s ease, box-shadow .28s ease;
}
.pf-campaign:first-child { grid-row: span 2; min-height: 418px; }
.pf-campaign:hover { transform: translateY(-4px); box-shadow: var(--pf-shadow); color: #fff; }
.pf-campaign-mask {
    position: absolute; inset: 0;
    background: linear-gradient(180deg, rgba(6, 13, 28, .18) 0%, rgba(6, 13, 28, .82) 100%);
}
.pf-campaign-body { position: relative; z-index: 1; }
.pf-campaign h3 { color: #fff; font-size: 19px; margin: 10px 0 6px; line-height: 1.35; }
.pf-campaign:first-child h3 { font-size: 25px; }
.pf-campaign p { margin: 0 0 12px; font-size: 13px; color: rgba(255, 255, 255, .76); line-height: 1.6; }
.pf-campaign-link { font-size: 13px; font-weight: 600; color: #ffd166; }
@media (max-width: 900px) {
    .pf-campaign-grid { grid-template-columns: 1fr 1fr; }
    .pf-campaign:first-child { grid-column: span 2; grid-row: auto; min-height: 220px; }
}
@media (max-width: 560px) {
    .pf-campaign-grid { grid-template-columns: 1fr; }
    .pf-campaign:first-child { grid-column: auto; }
    .pf-campaign { min-height: 170px; }
}

/* =========================================================================
   十四、学习中心课程卡片
   ========================================================================= */
.pf-course-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.pf-course { background: #fff; border: 1px solid var(--pf-line); border-radius: 16px; overflow: hidden; display: flex; flex-direction: column; transition: all .26s ease; }
.pf-course:hover { transform: translateY(-5px); box-shadow: var(--pf-shadow); border-color: rgba(37, 99, 235, .22); }
.pf-course .cover { position: relative; aspect-ratio: 16 / 10; background: linear-gradient(135deg, #1e5fff, #38bdf8); overflow: hidden; }
.pf-course .cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.pf-course:hover .cover img { transform: scale(1.05); }
.pf-course-lessons { position: absolute; left: 10px; bottom: 10px; font-size: 11px; font-weight: 700; color: #fff; background: rgba(8, 16, 31, .62); padding: 3px 9px; border-radius: 6px; backdrop-filter: blur(4px); }
.pf-course-body { padding: 16px 18px 18px; display: flex; flex-direction: column; flex: 1; }
.pf-course-cat { font-size: 11px; font-weight: 700; color: var(--pf-blue); letter-spacing: .5px; margin-bottom: 6px; }
.pf-course-body h3 { margin: 0 0 8px; font-size: 15.5px; line-height: 1.45; font-weight: 700; }
.pf-course-body h3 a { color: var(--pf-text); }
.pf-course-body h3 a:hover { color: var(--pf-blue); }
.pf-course-body p { margin: 0 0 12px; font-size: 12.5px; color: var(--pf-muted); line-height: 1.6; min-height: 40px; }
.pf-course-meta { display: flex; justify-content: space-between; gap: 8px; font-size: 12px; color: var(--pf-muted); padding-top: 10px; border-top: 1px dashed var(--pf-line); margin-bottom: 12px; }
.pf-course-actions { display: flex; gap: 8px; margin-top: auto; }
.pf-course-actions .pf-btn { flex: 1; }
@media (max-width: 1100px) { .pf-course-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .pf-course-grid { grid-template-columns: 1fr; } }

/* 补充：Hero 文案容器 / 数字滚动 */
.pf-hero-copy { min-width: 0; position: relative; z-index: 2; }
.pf-count { font-variant-numeric: tabular-nums; }

/* 导航拥挤时按优先级收起次要栏目（保留学习/任务/就业入口） */
.header .nav li a { white-space: nowrap; }

@media (max-width: 860px) {
    .header .logo .logo-text small { display: none; }
    .header .logo .logo-text { font-size: 19px; }
    .header .nav { margin-left: 12px; }
    .header .nav > ul > li > a { padding: 0 7px; font-size: 12.5px; }
    .pf-nav-tag { display: none; }
}

/* 内页 Hero 双栏（移动端自动单栏） */
.pf-hero-split { display: grid; grid-template-columns: 1.1fr .9fr; gap: 44px; align-items: center; }
.pf-hero-split > * { min-width: 0; }
@media (max-width: 1100px) { .pf-hero-split { grid-template-columns: 1fr; gap: 32px; } }

/* 四列收益卡 / 紧凑任务行（移动端自动降列） */
.pf-benefit-grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1100px) { .pf-benefit-grid-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .pf-benefit-grid-4 { grid-template-columns: 1fr; } }
.pf-task-row-compact { grid-template-columns: 1fr 150px; padding: 16px 20px; }
@media (max-width: 768px) { .pf-task-row-compact { grid-template-columns: 1fr; } }

/* 相关课程四列（移动端降列） */
.course-list-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1100px) { .course-list-4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .course-list-4 { grid-template-columns: 1fr; } }

/* 顶部信息条在窄屏收敛 */
@media (max-width: 1000px) {
    .topbar .topbar-info span:first-child { display: none; }
    .topbar .topbar-tools a { padding: 0 6px; }
    .topbar .topbar-inner { flex-wrap: wrap; gap: 4px; }
}

/* 旧版内页标题升级：统一为深色渐变，与新视觉衔接 */
.page-header {
    background: var(--pf-grad-dark);
    color: #fff;
    position: relative;
    overflow: hidden;
    padding: 58px 0 52px;
}
.page-header::before {
    content: '';
    position: absolute; inset: 0;
    background:
        radial-gradient(520px 320px at 84% 4%, rgba(37, 99, 235, .34), transparent 62%),
        radial-gradient(420px 300px at 8% 100%, rgba(124, 92, 255, .26), transparent 65%);
}
.page-header > * { position: relative; }
.page-header h1 { color: #fff; font-size: clamp(26px, 3.2vw, 38px); letter-spacing: -.6px; }
.page-header .sub { color: rgba(226, 236, 255, .72); }
.page-header p { color: rgba(226, 236, 255, .72); }
.page-header p a { color: #9fc4ff; }
.page-header p a:hover { color: #fff; }
.page-header .cat-list a { background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.18); }
.page-header .cat-list a:hover, .page-header .cat-list a.active { background: #fff; color: var(--pf-blue); }

/* 活动卡：图片缺失/加载失败时的品牌色兜底 */
.pf-campaign:nth-child(1) { background-color: #1e5fff; }
.pf-campaign:nth-child(2) { background-color: #7c5cff; }
.pf-campaign:nth-child(3) { background-color: #0ea5e9; }
.pf-campaign:nth-child(4) { background-color: #ff8a00; }
.pf-campaign .pf-campaign-mask {
    background:
        radial-gradient(420px 220px at 85% 0%, rgba(255, 255, 255, .22), transparent 65%),
        linear-gradient(180deg, rgba(6, 13, 28, .12) 0%, rgba(6, 13, 28, .82) 100%);
}

/* =========================================================================
   十五、结业证书展示 / 验证
   ========================================================================= */
.pf-cert-big {
    background: linear-gradient(150deg, #fffdf7 0%, #fff6e2 100%);
    border: 1px solid #e8d9b5;
    border-radius: 18px;
    padding: 30px;
    box-shadow: var(--pf-shadow);
    position: relative;
    overflow: hidden;
}
.pf-cert-big::before {
    content: '';
    position: absolute; right: -80px; top: -80px; width: 240px; height: 240px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(255, 176, 32, .16), transparent 68%);
}
.pf-cert-big-head {
    display: flex; justify-content: space-between; align-items: center; gap: 14px;
    padding-bottom: 18px; border-bottom: 1px dashed #e3d3a9; position: relative;
}
.pf-cert-big-head .brand { display: flex; gap: 12px; align-items: center; }
.pf-cert-big-head .mark {
    width: 46px; height: 46px; border-radius: 12px; background: var(--pf-grad-gold);
    color: #2a1500; font-weight: 800; font-size: 20px;
    display: flex; align-items: center; justify-content: center;
}
.pf-cert-big-head .brand b { font-size: 18px; color: #2a1500; display: block; line-height: 1.2; }
.pf-cert-big-head .brand small { display: block; font-size: 9.5px; letter-spacing: 2px; color: #a35c00; }
.pf-cert-big-head .verified {
    font-size: 12px; font-weight: 700; color: #0b7a5f;
    background: rgba(34, 211, 166, .14); padding: 6px 13px; border-radius: 999px; white-space: nowrap;
}
.pf-cert-big-body { padding: 26px 0 8px; text-align: center; position: relative; }
.pf-cert-big-body .to { color: #a38a5c; letter-spacing: 6px; font-size: 13px; margin: 0 0 6px; }
.pf-cert-big-body .who {
    font-family: "Songti SC", "STSong", "SimSun", serif;
    font-size: clamp(26px, 4vw, 40px); margin: 0 0 12px; color: #1a2236; letter-spacing: 2px;
}
.pf-cert-big-body .desc { max-width: 640px; margin: 0 auto 22px; color: #5a4a2a; line-height: 1.9; font-size: 14px; }
.pf-cert-big-meta {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
    background: #ede0c4; border: 1px solid #ede0c4; border-radius: 12px; overflow: hidden;
    text-align: center;
}
.pf-cert-big-meta > div { background: #fffdf8; padding: 14px 10px; }
.pf-cert-big-meta span { display: block; font-size: 11px; color: #a38a5c; margin-bottom: 4px; letter-spacing: 1px; }
.pf-cert-big-meta b { font-size: 13px; color: #2c3e50; word-break: break-all; }
.pf-cert-big-meta b.ok { color: #0b7a5f; }
.pf-cert-big-foot {
    display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
    padding-top: 20px; margin-top: 20px; border-top: 1px dashed #e3d3a9; position: relative;
}
.pf-cert-big-foot .seal {
    width: 88px; height: 88px; border-radius: 50%; border: 3px double #c26800;
    color: #c26800; display: flex; flex-direction: column; align-items: center; justify-content: center;
    font-size: 14px; font-weight: 700; transform: rotate(-8deg); opacity: .88; flex-shrink: 0;
}
.pf-cert-big-foot .seal small { font-size: 10px; font-weight: 400; }
.pf-cert-big-foot .note { flex: 1; min-width: 200px; font-size: 11.5px; color: #8a7650; line-height: 1.8; }
.pf-cert .verify-link { display: inline-block; margin-top: 10px; font-size: 12px; font-weight: 600; color: #a35c00; }
.pf-cert .verify-link:hover { color: #7a4300; text-decoration: underline; }
@media (max-width: 768px) {
    .pf-cert-big { padding: 20px; }
    .pf-cert-big-meta { grid-template-columns: repeat(2, 1fr); }
    .pf-cert-big-foot .seal { width: 72px; height: 72px; font-size: 12px; }
}

/* =========================================================================
   十六、手机端兼容修正
   ========================================================================= */
@media (max-width: 768px) {
    /* 内页深色头图在手机上的留白与字号 */
    .page-header { padding: 40px 0 36px; }
    .pf-page-hero { padding: 34px 0 38px; }
    .pf-task-hero { padding: 34px 0 40px; }
    .pf-guarantee-hero { padding: 36px 0 42px; }

    .pf-task-hero h1,
    .pf-guarantee-hero h1 { font-size: 28px; letter-spacing: -.5px; }
    .pf-page-hero .lead,
    .pf-task-hero p,
    .pf-guarantee-hero p.lead { font-size: 14px; line-height: 1.85; }

    /* 按钮：小屏更紧凑，必要时铺满一行 */
    .pf-btn-lg { height: 50px; padding: 0 22px; font-size: 15px; border-radius: 10px; }
    .pf-hero-actions { gap: 10px; }
    .pf-hero-actions .pf-btn { flex: 1 1 auto; justify-content: center; }

    /* 筛选栏：下拉与搜索框占满，避免横向溢出 */
    .pf-filter-bar select { flex: 1 1 46%; width: auto; min-width: 0; }
    .pf-filter-bar .pf-search { flex: 1 1 100%; }
    .pf-filter-bar .pf-search input { flex: 1; min-width: 0; }
    .pf-search input { min-width: 0; }

    /* 卡片与表单间距 */
    .pf-cert-big-head { flex-wrap: wrap; }
    .pf-cert-big-foot .note { font-size: 11px; }
    .pf-partner-grid { grid-template-columns: repeat(2, 1fr); }
    .pf-task-hero-stats,
    .pf-guarantee-stats { gap: 18px 24px; }
    .pf-hero-stats { gap: 18px 20px; }
    .pf-reward-box { padding: 18px; }
    .pf-detail-grid { gap: 18px; }
    .pf-panel { padding: 18px 16px; }
    .pf-article { padding: 18px 16px; }
    .pf-note-box { padding: 18px 16px; }
    .pf-player-tools .name { font-size: 13px; }
    .pf-lesson-item .lt { font-size: 12.5px; }
}

@media (max-width: 480px) {
    .pf-hero h1 { font-size: 30px; }
    .pf-hero-sub { font-size: 14px; }
    .pf-hero-stats b { font-size: 24px; }
    .pf-card-progress { width: 220px; }
    .pf-card-bounty { width: 180px; right: 0; }
    .pf-card-offer { width: 210px; }
    .pf-card { border-radius: 14px; }
    .pf-seal { width: 180px; height: 180px; }
    .pf-seal b { font-size: 38px; }
    .pf-seal span { font-size: 12px; }
    .pf-salary-item { grid-template-columns: 92px 1fr 56px; gap: 8px; }
    .pf-salary-item .val { font-size: 13px; }
    .pf-cert-big-meta { grid-template-columns: 1fr; }
    .pf-filter-bar select { flex: 1 1 100%; }
    .pf-task-hero h1,
    .pf-guarantee-hero h1 { font-size: 25px; }
    .pf-step-flow { gap: 12px; }
    .pf-story { padding: 18px; }
    .pf-footer-cta h2 { font-size: 22px; }
}

/* 学习页：网格子项允许收缩，避免长按钮把内容顶出屏幕 */
.pf-learn-shell > * { min-width: 0; }
.pf-learn-main, .pf-learn-side { min-width: 0; }

@media (max-width: 768px) {
    /* 数据条统一两列，避免 3+1 的参差 */
    .pf-task-hero-stats,
    .pf-guarantee-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px 18px; }
    .pf-task-hero-stats b,
    .pf-guarantee-stats b { font-size: 26px; }

    /* 上一节 / 下一节 长标题在手机端换行，不再撑宽页面 */
    .pf-pager { display: grid; grid-template-columns: 1fr; gap: 10px; }
    .pf-pager .pf-btn { white-space: normal; height: auto; min-height: 44px; padding: 10px 14px; text-align: left; line-height: 1.5; }
    .pf-article, .pf-rich { overflow-wrap: anywhere; }
    .pf-player-tools .name { min-width: 100%; }
}

/* =========================================================================
   十七、顶部信息条 / 平板与手机 Hero 卡片
   ========================================================================= */
.topbar a { white-space: nowrap; }
@media (max-width: 1180px) {
    .topbar .topbar-info { display: none; }
    .topbar .topbar-inner { justify-content: flex-end; }
}
@media (max-width: 900px) {
    .topbar .topbar-tools a { padding: 0 7px; font-size: 11.5px; }
}

/* 平板 / 手机：Hero 右侧浮层卡改为静态堆叠，避免错位与大面积留白 */
@media (max-width: 1100px) {
    .pf-hero-visual {
        position: static; min-height: 0; margin-top: 10px;
        display: grid; gap: 12px; width: 100%; max-width: 560px;
    }
    .pf-hero-visual .pf-card {
        position: static; width: 100%; max-width: none;
        animation: none; transform: none;
    }
    .pf-hero-visual .pf-glow { display: none; }
    .pf-hero-visual .pf-card-bounty .amount { font-size: 30px; }
}

.pf-hero-visual-single { min-height: 0; }

/* 手机菜单层级高于客服气泡，并去掉无子菜单项的箭头 */
@media (max-width: 768px) {
    .nav-mobile { z-index: 10050; }
    .nav-backdrop { z-index: 10040; }
    .nav-toggle { z-index: 10060; }
    .nav-mobile > ul > li > a:only-child::after { content: none; }
}

/* 平板 / 手机 Hero 卡片居中 */
@media (max-width: 1100px) {
    .pf-hero-visual { margin: 10px auto 0; }
}

/* 手机端：header 自身建立更高层级，确保侧滑菜单盖住客服气泡 */
@media (max-width: 768px) {
    .header { z-index: 10045; }
}

/* 桌面 / 平板：给右侧客服气泡与浮动工具预留安全区，避免遮挡按钮与侧栏 */
@media (min-width: 769px) and (max-width: 1439px) {
    .pf-container { padding-right: 96px; }
}
.pf-filter-bar .pf-search { margin-left: auto; }

/* 手机端隐藏浮动工具栏（保留 AI 客服气泡），避免遮挡内容 */
@media (max-width: 768px) {
    .floating-tools { display: none; }
}

/* 首页活动横幅（整幅展示，不叠加文字，避免与图片内文案重复） */
.pf-banner {
    display: block; border-radius: 18px; overflow: hidden;
    box-shadow: var(--pf-shadow); background: #0d1730;
    transition: transform .25s ease, box-shadow .25s ease;
}
.pf-banner:hover { transform: translateY(-3px); box-shadow: var(--pf-shadow-lg); }
.pf-banner img { display: block; width: 100%; height: auto; }
@media (max-width: 640px) {
    .pf-banner { border-radius: 12px; }
}

/* 手机端客服气泡固定右下角，避免遮挡正文中部 */
@media (max-width: 768px) {
    body .xdb-chat-fab { right: 12px; bottom: 18px; width: 48px; height: 48px; font-size: 22px; }
    body .xdb-chat-panel { right: 12px; bottom: 76px; width: calc(100vw - 24px); max-height: calc(100vh - 150px); }
}

/* 头部「免费试学」推荐课程 CTA */
.header-trial {
    display: flex; flex-direction: column; justify-content: center; gap: 1px;
    margin-left: 14px; padding: 7px 15px; border-radius: 10px;
    background: linear-gradient(135deg, #ffb020 0%, #ff7a00 100%);
    color: #2a1500 !important; box-shadow: 0 6px 16px rgba(255, 138, 0, .28);
    transition: all .22s ease; white-space: nowrap; flex-shrink: 0;
}
.header-trial b { font-size: 14px; line-height: 1.2; font-weight: 800; }
.header-trial small {
    font-size: 10.5px; line-height: 1.2; opacity: .8;
    max-width: 118px; overflow: hidden; text-overflow: ellipsis;
}
.header-trial:hover { transform: translateY(-1px); box-shadow: 0 10px 22px rgba(255, 138, 0, .38); color: #2a1500; }
@media (max-width: 1180px) { .header-trial { display: none; } }

@media (max-width: 768px) {
    .nav-mobile .nav-trial {
        display: flex; align-items: center; justify-content: center; gap: 6px;
        margin: 20px 18px 0; padding: 13px 16px; border-radius: 8px;
        background: linear-gradient(135deg, #ffb020, #ff7a00); color: #2a1500 !important;
        font-size: 14px; font-weight: 700; text-align: center;
    }
    .nav-mobile .nav-trial + .nav-phone { margin-top: 10px; }
}

/* =========================================================================
   十八、获客组件：留资表单 / 优惠券 / 手机底部留资条
   ========================================================================= */
.lead-card {
    background: #fff; border: 1px solid var(--pf-line); border-radius: 16px;
    padding: 22px; box-shadow: 0 16px 44px rgba(13,23,48,.10);
}
.lead-card-head h3 { margin: 0 0 6px; font-size: 18px; font-weight: 800; }
.lead-card-head p { margin: 0 0 14px; color: var(--pf-muted); font-size: 12.5px; line-height: 1.7; }
.lead-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.lead-form input[type=text], .lead-form input[type=tel], .lead-form select, .lead-form textarea {
    width: 100%; border: 1px solid var(--pf-line); border-radius: 9px; padding: 11px 12px;
    font-size: 14px; font-family: inherit; color: var(--pf-text); background: #fbfdff;
    margin-bottom: 10px; outline: none; box-sizing: border-box;
}
.lead-form textarea { min-height: 76px; resize: vertical; }
.lead-form input:focus, .lead-form select:focus, .lead-form textarea:focus { border-color: var(--pf-blue); background: #fff; box-shadow: 0 0 0 3px rgba(37,99,235,.1); }
.lead-privacy { display: flex; gap: 7px; align-items: flex-start; font-size: 11.5px; color: var(--pf-muted); line-height: 1.6; margin: 2px 0 12px; }
.lead-privacy input { width: auto; margin: 2px 0 0; flex-shrink: 0; }
.lead-privacy a { color: var(--pf-blue); }
.lead-submit {
    width: 100%; height: 48px; border: 0; border-radius: 10px; cursor: pointer;
    background: linear-gradient(135deg,#ffb020,#ff7a00); color: #2a1500;
    font-size: 15px; font-weight: 800; box-shadow: 0 8px 20px rgba(255,138,0,.3);
    transition: all .2s;
}
.lead-submit:hover { transform: translateY(-1px); box-shadow: 0 12px 26px rgba(255,138,0,.4); }
.lead-tip { text-align: center; font-size: 11.5px; color: #9aa6b8; margin-top: 10px; }
.lead-ok, .lead-err { border-radius: 10px; padding: 14px 16px; font-size: 13.5px; line-height: 1.7; }
.lead-ok { background: #eafaf4; color: #0b7a5f; border: 1px solid #b6ecd9; }
.lead-err { background: #fdecec; color: #c0392b; border: 1px solid #f5b7b1; margin-bottom: 10px; }
.lead-card-compact .lead-row { grid-template-columns: 1fr; }

.lp-hero { padding: 46px 0 56px; }
.lp-hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 46px; align-items: center; }
.lp-hero h1 { font-size: clamp(30px, 4vw, 50px); line-height: 1.18; margin: 18px 0 14px; color: #fff; font-weight: 800; letter-spacing: -1px; }
.lp-hero h1 .hl-gold { color: #ffc247; }
.lp-hero .lead { font-size: 15.5px; color: rgba(226,236,255,.76); line-height: 1.9; margin: 0 0 22px; }
.lp-stats { display: grid; grid-template-columns: repeat(4, auto); gap: 30px; padding: 20px 0; border-top: 1px solid rgba(255,255,255,.12); border-bottom: 1px solid rgba(255,255,255,.12); }
.lp-stats b { display: block; font-size: 26px; font-weight: 800; color: #ffd166; letter-spacing: -.5px; }
.lp-stats span { font-size: 12px; color: rgba(226,236,255,.62); }
.lp-hero-points { display: flex; gap: 18px; flex-wrap: wrap; margin-top: 18px; font-size: 12.5px; color: rgba(226,236,255,.7); }
.lp-form-col .lead-card { color: var(--pf-text); }
.lp-form-col .lead-card h3, .lp-form-col .lead-card p { color: var(--pf-text); }
.lp-final { padding: 54px 0; }

.pf-coupon {
    display: grid; grid-template-columns: 210px 1fr; background: #fff; border-radius: 16px;
    overflow: hidden; border: 1px solid #ffe0a3; box-shadow: var(--pf-shadow);
}
.pf-coupon-left {
    background: linear-gradient(150deg,#ffb020,#ff7a00); color: #2a1500;
    display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 26px 16px;
    border-right: 2px dashed #fff3d6;
}
.pf-coupon-left .val { font-size: 44px; font-weight: 800; line-height: 1; letter-spacing: -1px; }
.pf-coupon-left .val small { font-size: 18px; }
.pf-coupon-left .val span { font-size: 52px; }
.pf-coupon-left .lbl { font-size: 12px; font-weight: 700; margin-top: 6px; letter-spacing: 2px; }
.pf-coupon-right { padding: 24px 26px; }
.pf-coupon-right h2 { margin: 0 0 8px; font-size: 22px; }
.pf-coupon-right p { margin: 0 0 10px; color: var(--pf-muted); font-size: 13px; }
.pf-coupon-right .code { font-size: 14px; color: var(--pf-text); }
.pf-coupon-right .code strong { color: #c26800; letter-spacing: 2px; }

.mobile-cta-bar { display: none; }
@media (max-width: 768px) {
    .mobile-cta-bar {
        display: flex; gap: 8px; position: fixed; left: 0; right: 0; bottom: 0; z-index: 9998;
        padding: 8px 10px; background: #fff; box-shadow: 0 -6px 22px rgba(13,23,48,.12);
    }
    .mobile-cta-bar a {
        flex: 1; height: 46px; border-radius: 9px; display: flex; align-items: center; justify-content: center;
        font-size: 14px; font-weight: 700; background: #eef4ff; color: #1e5fff;
    }
    .mobile-cta-bar a.primary { background: linear-gradient(135deg,#ffb020,#ff7a00); color: #2a1500; }
    body { padding-bottom: 64px; }
    body .xdb-chat-fab { bottom: 80px; }
    body .xdb-chat-panel { bottom: 138px; }
    .lp-hero-grid { grid-template-columns: 1fr; gap: 26px; }
    .lp-hero { padding: 34px 0 40px; }
    .lp-stats { grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .lead-row { grid-template-columns: 1fr; gap: 0; }
    .pf-coupon { grid-template-columns: 1fr; }
    .pf-coupon-left { border-right: 0; border-bottom: 2px dashed #fff3d6; padding: 18px; }
}

/* keep the floating tool column clear of the chat bubble */
@media (min-width: 769px) {
    body .floating-tools { bottom: 96px; }
}