:root {
      --bg-primary: #0d1117;
      --bg-secondary: #161b22;
      --bg-tertiary: #1c2333;
      --bg-card: #161b22;
      --bg-card-hover: #21262d;
      --text-primary: #f0f6fc;
      --text-secondary: #c9d1d9;
      --text-muted: #8b949e;
      --text-faint: #6e7681;
      --accent-blue: #58a6ff;
      --accent-purple: #a78bfa;
      --accent-pink: #f472b6;
      --accent-green: #3fb950;
      --accent-amber: #f0b429;
      --accent-red: #f85149;
      --border-default: #21262d;
      --border-muted: #30363d;
      --gradient-highlight: linear-gradient(135deg, #58a6ff 0%, #a78bfa 50%, #f472b6 100%);
      --gradient-primary: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
      --gradient-accent: linear-gradient(135deg, #a855f7 0%, #ec4899 100%);
      --gradient-blue: linear-gradient(135deg, #58a6ff 0%, #3b82f6 100%);
      --gradient-warm: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
      --gradient-green: linear-gradient(135deg, #10b981 0%, #059669 100%);
      --shadow-sm: 0 1px 3px rgba(0,0,0,.3);
      --shadow-md: 0 4px 14px rgba(0,0,0,.4);
      --shadow-lg: 0 10px 40px rgba(0,0,0,.5);
      --shadow-glow-blue: 0 0 30px rgba(88,166,255,.15);
      --shadow-glow-purple: 0 0 30px rgba(167,139,250,.15);
      --r-sm: 6px;
      --r-md: 10px;
      --r-lg: 14px;
      --r-xl: 20px;
      --r-full: 9999px;
      --font: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
      --tr: all .3s cubic-bezier(.4,0,.2,1);
    }
    *, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
    html { scroll-behavior: smooth; font-size: 16px; }
    section[id] { scroll-margin-top: 88px; }
    body {
      font-family: var(--font);
      color: var(--text-secondary);
      background: var(--bg-primary);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    a { text-decoration: none; color: inherit; }
    button { cursor: pointer; border: none; font-family: inherit; }
    .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

    /* ===== NAVBAR ===== */
    .nav {
      position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
      background: rgba(13,17,23,.85);
      backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid var(--border-default);
      transition: var(--tr);
    }
    .nav.scrolled { background: rgba(13,17,23,.95); box-shadow: var(--shadow-sm); }
    .nav-inner {
      display: flex; align-items: center; justify-content: space-between;
      height: 68px; max-width: 1200px; margin: 0 auto; padding: 0 24px;
    }
    .nav-logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.15rem; color: var(--text-primary); }
    .nav-logo-icon {
      width: 34px; height: 34px;
      background: var(--gradient-primary);
      border-radius: var(--r-sm);
      display: flex; align-items: center; justify-content: center;
      color: #fff; font-size: .8rem; font-weight: 800; letter-spacing: -.5px;
    }
    .nav-links { display: flex; align-items: center; gap: 20px; list-style: none; }
    .nav-links a { font-size: .9rem; font-weight: 500; color: var(--text-muted); transition: var(--tr); }
    .nav-links a:hover { color: var(--accent-blue); }
    .nav-actions { display: flex; align-items: center; gap: 12px; }

    /* Buttons */
    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      padding: 10px 22px; border-radius: var(--r-md); font-size: .9rem; font-weight: 600;
      transition: var(--tr); white-space: nowrap;
    }
    .btn-ghost { color: var(--text-secondary); background: transparent; }
    .btn-ghost:hover { color: var(--text-primary); background: var(--bg-card-hover); }
    .btn-primary { background: var(--gradient-primary); color: #fff; box-shadow: var(--shadow-sm); }
    .btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-md), var(--shadow-glow-blue); }
    .btn-accent { background: var(--gradient-accent); color: #fff; box-shadow: var(--shadow-sm); }
    .btn-accent:hover { transform: translateY(-1px); box-shadow: var(--shadow-md), var(--shadow-glow-purple); }
    .btn-outline { border: 1px solid var(--border-muted); color: var(--text-secondary); background: transparent; }
    .btn-outline:hover { border-color: var(--accent-blue); color: #fff; }
    .btn-lg { padding: 14px 28px; font-size: .95rem; }
    .btn-xl { padding: 16px 36px; font-size: 1rem; border-radius: var(--r-lg); }
    .mobile-toggle { display: none; flex-direction: column; gap: 5px; background: none; padding: 4px; }
    .mobile-toggle span { width: 22px; height: 2px; background: var(--text-secondary); border-radius: 2px; transition: var(--tr); }

    /* ===== HERO ===== */
    .hero {
      padding: 140px 0 80px; position: relative; overflow: hidden;
      background: var(--bg-primary);
    }
    .hero::before {
      content: ''; position: absolute; top: -200px; left: 20%;
      width: 500px; height: 500px;
      background: radial-gradient(circle, rgba(59,130,246,.12) 0%, transparent 70%);
      border-radius: 50%;
    }
    .hero::after {
      content: ''; position: absolute; bottom: -150px; right: 15%;
      width: 400px; height: 400px;
      background: radial-gradient(circle, rgba(168,85,247,.08) 0%, transparent 70%);
      border-radius: 50%;
    }
    .hero-inner {
      display: grid; grid-template-columns: 1fr 1fr; gap: 60px;
      align-items: center; position: relative; z-index: 1;
    }
    .hero-badge {
      display: inline-flex; align-items: center; gap: 8px;
      padding: 6px 16px; background: rgba(88,166,255,.08);
      border: 1px solid rgba(88,166,255,.2); border-radius: var(--r-full);
      font-size: .82rem; font-weight: 600; color: var(--accent-blue); margin-bottom: 24px;
    }
    .hero-badge .dot {
      width: 7px; height: 7px; background: var(--accent-blue);
      border-radius: 50%; animation: pulse 2s infinite;
    }
    @keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.4} }
    .hero-title {
      font-size: 3.2rem; font-weight: 800; line-height: 1.15;
      color: var(--text-primary); margin-bottom: 20px; letter-spacing: -.02em;
    }
    .hero-title .hl {
      display: block; white-space: nowrap;
      background: var(--gradient-highlight);
      -webkit-background-clip: text; -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-sub {
      font-size: 1.1rem; color: var(--text-muted); line-height: 1.7;
      margin-bottom: 36px; max-width: 520px;
    }
    .hero-cta { display: flex; align-items: center; gap: 16px; margin-bottom: 40px; }
    .hero-trust {
      display: flex; align-items: center; gap: 16px;
      padding-top: 24px; border-top: 1px solid var(--border-default);
    }
    .hero-trust-avatars { display: flex; }
    .hero-trust-avatars .av {
      width: 34px; height: 34px; border-radius: 50%;
      border: 2px solid var(--bg-primary); margin-left: -10px;
      display: flex; align-items: center; justify-content: center;
      font-size: .72rem; font-weight: 700; color: #fff;
    }
    .hero-trust-avatars .av:first-child { margin-left: 0; }
    .hero-trust-text { font-size: .85rem; color: var(--text-muted); }
    .hero-trust-text strong { color: var(--text-primary); font-weight: 700; }

    /* Hero Visual */
    .hero-visual { position: relative; }
    .hero-mockup {
      background: var(--bg-secondary); border-radius: var(--r-xl);
      border: 1px solid var(--border-default); overflow: hidden;
      box-shadow: var(--shadow-lg);
    }
    .mockup-hd {
      display: flex; align-items: center; gap: 8px;
      padding: 14px 20px; background: var(--bg-card);
      border-bottom: 1px solid var(--border-default);
    }
    .mockup-dot { width: 10px; height: 10px; border-radius: 50%; }
    .mockup-dot.r { background: #ff5f57; }
    .mockup-dot.y { background: #febc2e; }
    .mockup-dot.g { background: #28c840; }
    .mockup-bd { padding: 24px; min-height: 320px; }
    .mockup-chat { display: flex; flex-direction: column; gap: 14px; }
    .chat-msg { display: flex; gap: 10px; animation: fiu .5s ease forwards; opacity: 0; }
    .chat-msg:nth-child(1) { animation-delay: .3s; }
    .chat-msg:nth-child(2) { animation-delay: .8s; }
    .chat-msg:nth-child(3) { animation-delay: 1.3s; }
    .chat-msg:nth-child(4) { animation-delay: 1.8s; }
    @keyframes fiu { from{opacity:0;transform:translateY(10px)} to{opacity:1;transform:translateY(0)} }
    .chat-av {
      width: 30px; height: 30px; border-radius: 50%; flex-shrink: 0;
      display: flex; align-items: center; justify-content: center;
      font-size: .68rem; font-weight: 700; color: #fff;
    }
    .chat-av.cl { background: var(--gradient-blue); }
    .chat-av.ai { background: var(--gradient-accent); }
    .chat-bb {
      padding: 12px 16px; border-radius: var(--r-md);
      font-size: .84rem; line-height: 1.5; max-width: 85%;
    }
    .chat-bb.cm { background: var(--bg-card-hover); color: var(--text-secondary); border: 1px solid var(--border-default); }
    .chat-bb.am { background: rgba(88,166,255,.06); color: var(--text-secondary); border: 1px solid rgba(88,166,255,.15); }
    .chat-bb .tag {
      display: inline-block; padding: 2px 8px; border-radius: var(--r-sm);
      font-size: .7rem; font-weight: 600; margin-top: 6px;
    }
    .chat-bb .tag.au { background: rgba(63,185,80,.12); color: var(--accent-green); }
    .chat-bb .tag.tr { background: rgba(88,166,255,.12); color: var(--accent-blue); }

    /* Float Cards */
    .float-card {
      position: absolute; background: var(--bg-secondary);
      border-radius: var(--r-lg); border: 1px solid var(--border-default);
      padding: 12px 16px; display: flex; align-items: center; gap: 10px;
      font-size: .8rem; font-weight: 600;
      box-shadow: var(--shadow-lg);
      animation: fl 4s ease-in-out infinite;
    }
    .float-card.tr { top: -10px; right: -20px; }
    .float-card.bl { bottom: 30px; left: -30px; animation-delay: 2s; }
    @keyframes fl { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }
    .float-icon {
      width: 34px; height: 34px; border-radius: var(--r-sm);
      display: flex; align-items: center; justify-content: center; font-size: 1rem;
    }
    .float-icon.gn { background: rgba(63,185,80,.12); color: var(--accent-green); }
    .float-icon.ab { background: rgba(168,85,247,.12); color: var(--accent-purple); }

    /* ===== STATS BAR ===== */
    .stats-bar {
      padding: 40px 0; border-top: 1px solid var(--border-default);
      border-bottom: 1px solid var(--border-default);
      background: var(--bg-secondary);
    }
    .stats-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 32px; text-align: center; }
    .stat-num { font-size: 2.2rem; font-weight: 800; color: var(--accent-blue); line-height: 1; margin-bottom: 6px; }
    .stat-lbl { font-size: .88rem; color: var(--text-muted); }

    /* ===== SECTIONS ===== */
    .section { padding: 100px 0; background: var(--bg-primary); }
    .sec-hd { text-align: center; max-width: 680px; margin: 0 auto 60px; }
    .sec-label {
      display: inline-flex; align-items: center; gap: 6px;
      font-size: .82rem; font-weight: 600; color: var(--accent-blue);
      text-transform: uppercase; letter-spacing: .05em; margin-bottom: 16px;
    }
    .sec-title {
      font-size: 2.4rem; font-weight: 800; color: var(--text-primary);
      line-height: 1.2; margin-bottom: 16px; letter-spacing: -.01em;
    }
    .sec-desc { font-size: 1.05rem; color: var(--text-muted); line-height: 1.7; }

    /* ===== FEATURES ===== */
    .feat-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
    .feat-card {
      background: var(--bg-secondary); border-radius: var(--r-lg);
      padding: 30px; border: 1px solid var(--border-default);
      transition: var(--tr); position: relative; overflow: hidden;
    }
    .feat-card::before {
      content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
      background: var(--gradient-highlight); opacity: 0; transition: var(--tr);
    }
    .feat-card:hover {
      transform: translateY(-4px); border-color: var(--border-muted);
      box-shadow: var(--shadow-lg);
    }
    .feat-card:hover::before { opacity: 1; }
    .feat-icon {
      width: 48px; height: 48px; border-radius: var(--r-md);
      display: flex; align-items: center; justify-content: center;
      font-size: 1.4rem; margin-bottom: 18px;
    }
    .feat-icon.bl { background: rgba(88,166,255,.1); }
    .feat-icon.pp { background: rgba(167,139,250,.1); }
    .feat-icon.gn { background: rgba(63,185,80,.1); }
    .feat-icon.am { background: rgba(240,180,41,.1); }
    .feat-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--text-primary); margin-bottom: 10px; }
    .feat-card p { font-size: .88rem; color: var(--text-muted); line-height: 1.6; }

    /* ===== WORKFLOW ===== */
    .wf-section { background: var(--bg-secondary); }
    .wf-section::before {
      content: ''; position: absolute; inset: 0;
      background: radial-gradient(ellipse at 30% 50%, rgba(88,166,255,.06) 0%, transparent 60%);
    }
    .wf-steps { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; position: relative; z-index: 1; }
    .wf-step {
      text-align: center; padding: 30px 20px; border-radius: var(--r-lg);
      background: var(--bg-primary); border: 1px solid var(--border-default);
      transition: var(--tr); position: relative;
    }
    .wf-step:hover {
      border-color: var(--accent-blue); transform: translateY(-4px);
      box-shadow: var(--shadow-glow-blue);
    }
    .step-num {
      width: 40px; height: 40px; border-radius: 50%;
      background: var(--gradient-primary); color: #fff;
      display: flex; align-items: center; justify-content: center;
      font-weight: 800; font-size: 1rem; margin: 0 auto 16px;
    }
    .wf-step h4 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; color: var(--text-primary); }
    .wf-step p { font-size: .84rem; color: var(--text-muted); line-height: 1.5; }
    .step-arrow {
      position: absolute; right: -16px; top: 50%; transform: translateY(-50%);
      color: var(--accent-blue); font-size: 1.2rem; z-index: 2;
    }

    /* ===== SHOWCASE ===== */
    .sc-section { background: var(--bg-primary); }
    .sc-tabs { display: flex; justify-content: center; gap: 8px; margin-bottom: 48px; flex-wrap: wrap; }
    .sc-tab {
      padding: 10px 22px; border-radius: var(--r-full);
      font-size: .88rem; font-weight: 600; color: var(--text-muted);
      background: var(--bg-secondary); border: 1px solid var(--border-default);
      transition: var(--tr);
    }
    .sc-tab:hover { color: var(--text-primary); border-color: var(--border-muted); }
    .sc-tab.active {
      color: #fff; background: var(--gradient-primary);
      border-color: transparent; box-shadow: var(--shadow-sm);
    }
    .sc-content {
      background: var(--bg-secondary); border-radius: var(--r-xl);
      border: 1px solid var(--border-default); padding: 40px; min-height: 400px;
    }
    .sc-panel { display: none; animation: fi .4s ease; }
    .sc-panel.active { display: block; }
    @keyframes fi { from{opacity:0} to{opacity:1} }
    .sc-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
    .sc-text h3 { font-size: 1.4rem; font-weight: 700; color: var(--text-primary); margin-bottom: 14px; }
    .sc-text p { font-size: .92rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 20px; }
    .sc-list { list-style: none; display: flex; flex-direction: column; gap: 12px; }
    .sc-list li { display: flex; align-items: center; gap: 10px; font-size: .88rem; color: var(--text-secondary); }
    .sc-list li .ck {
      width: 20px; height: 20px; border-radius: 50%;
      background: rgba(63,185,80,.12); color: var(--accent-green);
      display: flex; align-items: center; justify-content: center;
      font-size: .7rem; flex-shrink: 0;
    }
    .sc-vis {
      background: var(--bg-primary); border-radius: var(--r-lg);
      border: 1px solid var(--border-default); padding: 20px;
    }
    .sc-item {
      display: flex; align-items: center; gap: 14px;
      padding: 14px; border-radius: var(--r-md);
      border: 1px solid var(--border-default); margin-bottom: 12px;
      transition: var(--tr);
    }
    .sc-item:hover { border-color: var(--border-muted); background: var(--bg-card-hover); }
    .sc-item:last-child { margin-bottom: 0; }
    .sv-icon {
      width: 38px; height: 38px; border-radius: var(--r-sm);
      display: flex; align-items: center; justify-content: center;
      font-size: 1rem; flex-shrink: 0;
    }
    .sv-text { flex: 1; min-width: 0; }
    .sv-text .sv-t { font-size: .86rem; font-weight: 600; color: var(--text-primary); }
    .sv-text .sv-d { font-size: .76rem; color: var(--text-muted); }
    .sv-badge { padding: 4px 10px; border-radius: var(--r-full); font-size: .72rem; font-weight: 600; white-space: nowrap; }
    .sv-badge.hot { background: rgba(248,81,73,.12); color: var(--accent-red); }
    .sv-badge.new { background: rgba(63,185,80,.12); color: var(--accent-green); }
    .sv-badge.ai { background: rgba(88,166,255,.12); color: var(--accent-blue); }

    /* ===== PROMISE ===== */
    .pm-section {
      background: var(--bg-secondary);
      position: relative;
    }
    .pm-card {
      max-width: 800px; margin: 0 auto; text-align: center;
      background: var(--bg-primary); border-radius: var(--r-xl);
      padding: 60px 48px; border: 1px solid var(--border-default);
      position: relative; overflow: hidden;
      box-shadow: var(--shadow-lg);
    }
    .pm-card::before {
      content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
      background: var(--gradient-highlight);
    }
    .pm-icon {
      width: 68px; height: 68px; border-radius: 50%;
      background: rgba(240,180,41,.1);
      display: flex; align-items: center; justify-content: center;
      font-size: 1.8rem; margin: 0 auto 24px;
    }
    .pm-card h2 { font-size: 2rem; font-weight: 800; color: var(--text-primary); margin-bottom: 16px; }
    .pm-card h2 .hl {
      background: var(--gradient-highlight);
      -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
    }
    .pm-text {
      font-size: 1rem; color: var(--text-muted); line-height: 1.8;
      margin-bottom: 32px; max-width: 560px; margin-left: auto; margin-right: auto;
    }
    .pm-feats { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; margin-bottom: 36px; }
    .pm-feat {
      padding: 20px; border-radius: var(--r-md);
      background: var(--bg-secondary); border: 1px solid var(--border-default);
    }
    .pm-feat .pf-icon { font-size: 1.4rem; margin-bottom: 10px; }
    .pm-feat h4 { font-size: .88rem; font-weight: 700; color: var(--text-primary); margin-bottom: 4px; }
    .pm-feat p { font-size: .78rem; color: var(--text-muted); }

    /* ===== COMPARE TABLE ===== */
    .compare-table {
      width: 100%; max-width: 820px; margin: 0 auto 24px; border-collapse: collapse;
    }
    .compare-header, .compare-row {
      display: grid; grid-template-columns: 180px 1fr 1fr; gap: 0;
    }
    .compare-header {
      border-bottom: 1px solid var(--border-default); margin-bottom: 0;
    }
    .compare-col-label {
      padding: 14px 20px; font-size: .82rem; font-weight: 700; text-transform: uppercase; letter-spacing: .5px;
    }
    .compare-col-item { color: var(--text-muted); }
    .compare-col-sub { color: var(--text-muted); text-align: center; }
    .compare-col-tc {
      color: var(--accent-blue); text-align: center;
      background: linear-gradient(135deg, rgba(88,166,255,.08), rgba(167,139,250,.08));
      border-radius: var(--r-md) var(--r-md) 0 0;
    }
    .compare-row {
      border-bottom: 1px solid var(--border-default);
    }
    .compare-row:last-child { border-bottom: none; }
    .compare-cell {
      padding: 16px 20px; font-size: .92rem; line-height: 1.5; display: flex; align-items: center;
    }
    .compare-cell-label { color: var(--text-secondary); font-weight: 600; }
    .compare-cell-sub { color: var(--text-muted); justify-content: center; text-align: center; }
    .compare-cell-tc {
      color: var(--text-primary); font-weight: 500; justify-content: center; text-align: center;
      background: linear-gradient(135deg, rgba(88,166,255,.04), rgba(167,139,250,.04));
    }
    .compare-check {
      display: inline-flex; align-items: center; justify-content: center;
      width: 20px; height: 20px; border-radius: 50%; margin-right: 8px; flex-shrink: 0;
      background: linear-gradient(135deg, #58a6ff, #a78bfa);
      color: #fff; font-size: .7rem; font-weight: 700;
    }
    .compare-closing {
      text-align: center; font-size: 1.05rem; color: var(--text-secondary); margin: 28px auto 0; max-width: 600px;
    }
    .compare-cta { text-align: center; margin-top: 28px; }

    /* ===== TESTIMONIALS ===== */
    .tm-section { background: var(--bg-primary); }
    .tm-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
    .tm-card {
      background: var(--bg-secondary); border-radius: var(--r-lg);
      padding: 28px; border: 1px solid var(--border-default);
      transition: var(--tr);
    }
    .tm-card:hover { border-color: var(--border-muted); transform: translateY(-2px); box-shadow: var(--shadow-md); }
    .tm-stars { display: flex; gap: 2px; margin-bottom: 16px; color: var(--accent-amber); font-size: .9rem; }
    .tm-text { font-size: .9rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 20px; font-style: italic; }
    .tm-author { display: flex; align-items: center; gap: 12px; }
    .tm-avatar {
      width: 40px; height: 40px; border-radius: 50%;
      display: flex; align-items: center; justify-content: center;
      font-size: .85rem; font-weight: 700; color: #fff;
    }
    .tm-info .name { font-size: .88rem; font-weight: 600; color: var(--text-primary); }
    .tm-info .role { font-size: .78rem; color: var(--text-muted); }

    /* ===== FAQ ===== */
    .faq-section { background: var(--bg-secondary); }
    .faq-list { max-width: 720px; margin: 0 auto; }
    .faq-item { border-bottom: 1px solid var(--border-default); }
    .faq-q {
      display: flex; align-items: center; justify-content: space-between; width: 100%;
      padding: 22px 0; background: none;
      font-size: .95rem; font-weight: 600; color: var(--text-primary);
      text-align: left; transition: var(--tr);
    }
    .faq-q:hover { color: var(--accent-blue); }
    .faq-q .arrow { font-size: 1rem; transition: var(--tr); color: var(--text-faint); }
    .faq-item.open .faq-q .arrow { transform: rotate(180deg); color: var(--accent-blue); }
    .faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease, padding .3s ease; }
    .faq-item.open .faq-a { max-height: 300px; padding-bottom: 22px; }
    .faq-a p { font-size: .9rem; color: var(--text-muted); line-height: 1.7; }

    /* ===== CTA ===== */
    .cta-section {
      padding: 100px 0; background: var(--bg-primary);
      position: relative; overflow: hidden;
      border-top: 1px solid var(--border-default);
    }
    .cta-section::before {
      content: ''; position: absolute; top: 50%; left: 50%;
      transform: translate(-50%,-50%); width: 800px; height: 800px;
      background: radial-gradient(circle, rgba(88,166,255,.06) 0%, transparent 60%);
      border-radius: 50%;
    }
    .cta-inner { text-align: center; position: relative; z-index: 1; }
    .cta-inner h2 { font-size: 2.4rem; font-weight: 800; color: var(--text-primary); margin-bottom: 16px; }
    .cta-inner p { font-size: 1.05rem; color: var(--text-muted); margin-bottom: 36px; max-width: 500px; margin-left: auto; margin-right: auto; }
    .cta-btns { display: flex; justify-content: center; gap: 16px; margin-bottom: 24px; }
    .cta-note { font-size: .82rem; color: var(--text-faint); }

    /* ===== FOOTER ===== */
    .footer { background: var(--bg-secondary); padding: 60px 0 30px; border-top: 1px solid var(--border-default); }
    .footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 48px; margin-bottom: 48px; }
    .footer-brand .footer-logo {
      display: flex; align-items: center; gap: 10px;
      font-weight: 700; font-size: 1.1rem; color: var(--text-primary); margin-bottom: 14px;
    }
    .footer-brand p { font-size: .88rem; color: var(--text-muted); line-height: 1.6; max-width: 280px; }
    .footer-col h4 {
      font-size: .82rem; font-weight: 700; color: var(--text-primary);
      margin-bottom: 16px; text-transform: uppercase; letter-spacing: .05em;
    }
    .footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
    .footer-col a { font-size: .88rem; color: var(--text-muted); transition: var(--tr); }
    .footer-col a:hover { color: var(--accent-blue); }
    .footer-bottom {
      padding-top: 24px; border-top: 1px solid var(--border-default);
      display: flex; justify-content: space-between; align-items: center;
    }
    .footer-bottom p { font-size: .82rem; color: var(--text-faint); }

    .footer-brand .footer-qr-row { display: flex; gap: 18px; margin-top: 18px; }
    .footer-qr { display: flex; flex-direction: column; align-items: center; gap: 6px; text-align: center; }
    .footer-qr img { width: 100px; height: 100px; border-radius: 8px; display: block; }
    .footer-qr span { font-size: .75rem; color: var(--text-faint); line-height: 1.6; }

    /* Mobile Nav */
    .mobile-nav {
      display: none; position: fixed; top: 68px; left: 0; right: 0; bottom: 0;
      background: var(--bg-primary); z-index: 999; padding: 24px;
      flex-direction: column; gap: 8px; overflow-y: auto;
      border-top: 1px solid var(--border-default);
    }
    .mobile-nav.open { display: flex; }
    .mobile-nav a {
      display: block; padding: 14px 16px; font-size: 1rem; font-weight: 500;
      color: var(--text-secondary); border-radius: var(--r-md); transition: var(--tr);
    }
    .mobile-nav a:hover { background: var(--bg-card-hover); color: var(--accent-blue); }

    /* Reveal */
    .reveal { opacity: 0; transform: translateY(30px); transition: opacity .6s ease, transform .6s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }

    /* ===== RESPONSIVE ===== */
    @media(max-width:1024px) {
      .hero-inner { grid-template-columns: 1fr; gap: 40px; }
      .hero-title { font-size: 2.6rem; }
      .hero-visual { max-width: 560px; }
      .feat-grid { grid-template-columns: repeat(2,1fr); }
      .wf-steps { grid-template-columns: repeat(2,1fr); }
      .step-arrow { display: none; }
      .tm-grid { grid-template-columns: repeat(2,1fr); }
      .tm-grid[style] { grid-template-columns: repeat(2,1fr) !important; }
      .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    }
    @media(max-width:768px) {
      .nav-links { display: none; }
      .nav-actions { display: none; }
      .mobile-toggle { display: flex; }
      .nav-logo { white-space: nowrap; font-size: 1rem; }
      .hero { padding: 110px 0 60px; }
      .hero-title { font-size: 2rem; }
      .hero-sub { font-size: .95rem; }
      .hero-cta { flex-direction: column; align-items: flex-start; }
      .stats-grid { grid-template-columns: repeat(2,1fr); gap: 24px; }
      .section { padding: 70px 0; }
      .sec-title { font-size: 1.8rem; }
      .feat-grid { grid-template-columns: 1fr; }
      .wf-steps { grid-template-columns: 1fr; }
      .sc-grid { grid-template-columns: 1fr; }
      .pm-feats { grid-template-columns: 1fr; }
      .pm-card { padding: 40px 24px; }
      .compare-header, .compare-row { grid-template-columns: 1fr; }
      .compare-header { display: none; }
      .compare-row { padding: 16px 0; }
      .compare-cell { padding: 6px 0; justify-content: flex-start !important; text-align: left !important; }
      .compare-cell-label { font-size: .82rem; color: var(--text-muted); font-weight: 700; padding-bottom: 2px; border-bottom: 1px solid var(--border-default); margin-bottom: 4px; }
      .compare-cell-sub { color: var(--text-muted); justify-content: flex-start !important; }
      .compare-cell-tc { color: var(--accent-blue); justify-content: flex-start !important; background: none; font-weight: 600; }
      .tm-grid { grid-template-columns: 1fr; }
      .tm-grid[style] { grid-template-columns: 1fr !important; }
      .cta-inner h2 { font-size: 1.8rem; }
      .cta-btns { flex-direction: column; align-items: center; }
      .footer-grid { grid-template-columns: 1fr; gap: 28px; }
      .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
      .footer-brand .footer-qr-row { justify-content: center; }
      .float-card { display: none; }
    }
    @media(max-width:480px) {
      .hero-title { font-size: 1.7rem; }
      .stat-num { font-size: 1.6rem; }
      .sc-tab { padding: 8px 16px; font-size: .82rem; }
    }
/* ===== ABOUT PAGE ===== */
.about-hero { padding: 140px 0 60px; text-align: center; }
.about-hero h1 { font-size: 2.8rem; font-weight: 800; color: var(--text-primary); margin-bottom: 20px; }
.about-hero p { font-size: 1.1rem; color: var(--text-muted); max-width: 640px; margin: 0 auto; line-height: 1.8; }
.mission-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; margin-top: 48px; }
.mission-card { background: var(--bg-secondary); border: 1px solid var(--border-default); border-radius: var(--r-lg); padding: 28px; text-align: center; transition: var(--tr); }
.mission-card:hover { border-color: var(--border-muted); transform: translateY(-2px); }
.mission-card .m-icon { font-size: 2rem; margin-bottom: 14px; }
.mission-card h3 { font-size: 1rem; font-weight: 700; color: var(--text-primary); margin-bottom: 8px; }
.mission-card p { font-size: .88rem; color: var(--text-muted); line-height: 1.6; }
.timeline { max-width: 700px; margin: 0 auto; position: relative; padding-left: 40px; }
.timeline::before { content: ''; position: absolute; left: 15px; top: 0; bottom: 0; width: 2px; background: var(--border-default); }
.tl-item { position: relative; margin-bottom: 36px; }
.tl-item::before { content: ''; position: absolute; left: -29px; top: 6px; width: 12px; height: 12px; border-radius: 50%; background: var(--gradient-primary); border: 2px solid var(--bg-primary); }
.tl-item h4 { font-size: .95rem; font-weight: 700; color: var(--text-primary); margin-bottom: 6px; }
.tl-item p { font-size: .88rem; color: var(--text-muted); line-height: 1.6; }
.sponsor-section { background: var(--bg-secondary); border-radius: var(--r-xl); border: 1px solid var(--border-default); padding: 48px; text-align: center; max-width: 700px; margin: 0 auto; }
.sponsor-section h3 { font-size: 1.3rem; font-weight: 700; color: var(--text-primary); margin-bottom: 12px; }
.sponsor-section p { font-size: .92rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 24px; }

/* ===== BLOG PAGE ===== */
.blog-hero { padding: 140px 0 40px; text-align: center; }
.blog-hero h1 { font-size: 2.4rem; font-weight: 800; color: var(--text-primary); margin-bottom: 16px; }
.blog-hero p { font-size: 1.05rem; color: var(--text-muted); max-width: 600px; margin: 0 auto; }
.blog-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 20px; }
.blog-card { background: var(--bg-secondary); border: 1px solid var(--border-default); border-radius: var(--r-lg); padding: 28px; transition: var(--tr); display: flex; flex-direction: column; }
.blog-card:hover { border-color: var(--border-muted); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.blog-card .b-cat { display: inline-block; padding: 4px 12px; border-radius: var(--r-full); font-size: .75rem; font-weight: 600; margin-bottom: 14px; background: rgba(88,166,255,.1); color: var(--accent-blue); }
.blog-card h3 { font-size: 1.05rem; font-weight: 700; color: var(--text-primary); margin-bottom: 10px; line-height: 1.4; }
.blog-card p { font-size: .88rem; color: var(--text-muted); line-height: 1.6; flex: 1; margin-bottom: 16px; }
.blog-card .b-link { font-size: .88rem; font-weight: 600; color: var(--accent-blue); transition: var(--tr); }
.blog-card .b-link:hover { color: var(--accent-purple); }

/* ===== ARTICLE PAGE ===== */
.article-header { padding: 120px 0 40px; }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: .85rem; color: var(--text-muted); margin-bottom: 24px; }
.breadcrumb a { color: var(--accent-blue); transition: var(--tr); }
.breadcrumb a:hover { color: var(--accent-purple); }
.breadcrumb .sep { color: var(--text-faint); }
.article-header h1 { font-size: 2.2rem; font-weight: 800; color: var(--text-primary); line-height: 1.3; margin-bottom: 16px; max-width: 760px; }
.article-header .a-desc { font-size: 1.05rem; color: var(--text-muted); line-height: 1.7; max-width: 760px; }
.article-body { display: grid; grid-template-columns: 1fr 220px; gap: 48px; padding-bottom: 80px; max-width: 1200px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }
.article-content { min-width: 0; }
.article-content h2 { font-size: 1.4rem; font-weight: 700; color: var(--text-primary); margin: 40px 0 16px; padding-top: 20px; border-top: 1px solid var(--border-default); }
.article-content h2:first-child { margin-top: 0; border-top: none; padding-top: 0; }
.article-content h3 { font-size: 1.1rem; font-weight: 700; color: var(--text-primary); margin: 28px 0 12px; }
.article-content p { font-size: .95rem; color: var(--text-secondary); line-height: 1.8; margin-bottom: 16px; }
.article-content ul, .article-content ol { margin: 0 0 16px 20px; }
.article-content li { font-size: .92rem; color: var(--text-secondary); line-height: 1.7; margin-bottom: 8px; }
.article-content strong { color: var(--text-primary); font-weight: 600; }
.article-content .callout { background: var(--bg-secondary); border: 1px solid var(--border-default); border-radius: var(--r-md); padding: 20px; margin: 20px 0; }
.article-content .callout p { margin-bottom: 0; }
.article-toc { position: sticky; top: 90px; align-self: start; }
.article-toc h4 { font-size: .82rem; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: .05em; margin-bottom: 12px; }
.article-toc ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.article-toc a { font-size: .84rem; color: var(--text-muted); transition: var(--tr); line-height: 1.4; }
.article-toc a:hover { color: var(--accent-blue); }
.article-footer { border-top: 1px solid var(--border-default); padding: 40px 0; }
.article-footer .related { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.article-footer .related span { font-size: .88rem; font-weight: 600; color: var(--text-muted); }
.article-footer .related a { font-size: .88rem; color: var(--accent-blue); transition: var(--tr); }
.article-footer .related a:hover { color: var(--accent-purple); }

@media(max-width:1024px) {
  .mission-grid { grid-template-columns: 1fr; }
  .blog-grid { grid-template-columns: 1fr; }
  .article-body { grid-template-columns: 1fr; }
  .article-toc { display: none; }
}
@media(max-width:768px) {
  .about-hero h1 { font-size: 2rem; }
  .blog-hero h1 { font-size: 1.8rem; }
  .article-header h1 { font-size: 1.6rem; }
}

/* ===== LOGO ===== */
.logo-img-wrap { width: 54px; height: 34px; overflow: hidden; flex-shrink: 0; display: flex; align-items: center; justify-content: center; }
.logo-img-wrap img { width: 60px; height: 60px; object-fit: contain; }
.nav-logo-text { font-weight: 700; font-size: 1.1rem; color: var(--text-primary); }
@media(max-width:768px) {
  .logo-img-wrap { width: 44px; height: 28px; }
  .logo-img-wrap img { width: 50px; height: 50px; }
  .nav-logo-text { font-size: 0.95rem; }
}

/* Fix 2026-08-28: footer nav-logo 品牌描述不换行撑宽 */
.footer .nav-logo { white-space: normal; flex-wrap: wrap; }