:root {
      --primary: #2f6bff;
      --primary-light: #5b8cff;
      --accent: #00c2ff;
      --bg: #f4f9ff;
      --surface: rgba(255, 255, 255, 0.78);
      --surface-solid: #ffffff;
      --text: #0d1b3e;
      --text-secondary: #5a6a8f;
      --radius: 18px;
      --shadow: 0 8px 30px rgba(47, 107, 255, 0.12);
      --shadow-lg: 0 20px 60px rgba(47, 107, 255, 0.18);
      --gradient: linear-gradient(135deg, #2f6bff 0%, #00c2ff 100%);
      --gradient-soft: linear-gradient(135deg, rgba(47,107,255,0.08) 0%, rgba(0,194,255,0.08) 100%);
    }

    * { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.6;
      overflow-x: hidden;
    }

    .container {
      max-width: 520px;
      margin: 0 auto;
      padding: 0 18px;
      position: relative;
      z-index: 1;
    }

    /* Background ambient */
    .ambient {
      position: fixed;
      inset: 0;
      pointer-events: none;
      z-index: 0;
      overflow: hidden;
    }
    .orb {
      position: absolute;
      border-radius: 50%;
      filter: blur(80px);
      opacity: 0.45;
      animation: float 14s ease-in-out infinite;
    }
    .orb-1 { width: 320px; height: 320px; background: #2f6bff; top: -60px; right: -80px; }
    .orb-2 { width: 260px; height: 260px; background: #00c2ff; top: 420px; left: -90px; animation-delay: -4s; }
    .orb-3 { width: 200px; height: 200px; background: #2f6bff; bottom: 180px; right: -60px; animation-delay: -8s; opacity: 0.3; }

    @keyframes float {
      0%, 100% { transform: translateY(0) scale(1); }
      50% { transform: translateY(25px) scale(1.05); }
    }

    /* Header */
    header {
      position: sticky;
      top: 0;
      z-index: 100;
      backdrop-filter: blur(16px);
      background: rgba(244, 249, 255, 0.82);
      border-bottom: 1px solid rgba(255,255,255,0.6);
    }
    .nav {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 56px;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      font-size: 17px;
      color: var(--text);
      text-decoration: none;
    }
    .nav-link {
      font-size: 14px;
      color: var(--text-secondary);
      text-decoration: none;
      padding: 6px 10px;
      border-radius: 20px;
      background: rgba(255,255,255,0.55);
      border: 1px solid rgba(47,107,255,0.1);
    }

    /* Hero */
    .hero {
      padding: 46px 0 34px;
      text-align: center;
    }
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 7px 14px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      background: rgba(255,255,255,0.7);
      border: 1px solid rgba(47,107,255,0.14);
      margin-bottom: 18px;
      box-shadow: var(--shadow);
    }
    .badge svg { width: 14px; height: 14px; }
    h1 {
      font-size: 32px;
      line-height: 1.18;
      margin: 0 0 14px;
      font-weight: 800;
      letter-spacing: -0.5px;
    }
    h1 .highlight {
      background: var(--gradient);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }
    .hero-sub {
      font-size: 15px;
      color: var(--text-secondary);
      margin-bottom: 26px;
      line-height: 1.7;
    }
    .hero-visual {
      position: relative;
      height: 210px;
      margin-bottom: 26px;
    }
    .phone-card {
      position: absolute;
      background: var(--surface);
      border: 1px solid rgba(255,255,255,0.7);
      border-radius: 22px;
      box-shadow: var(--shadow-lg);
      backdrop-filter: blur(14px);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 16px;
      transition: transform .6s ease;
    }
    .phone-card svg { width: 38px; height: 38px; }
    .phone-card span { font-size: 12px; font-weight: 600; color: var(--text); }
    .phone-1 { width: 120px; height: 150px; left: 8%; top: 30px; transform: rotate(-10deg); }
    .phone-2 { width: 130px; height: 160px; left: 50%; top: 0; transform: translateX(-50%); z-index: 2; }
    .phone-3 { width: 120px; height: 150px; right: 8%; top: 30px; transform: rotate(10deg); }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 32px;
      border-radius: 30px;
      font-size: 16px;
      font-weight: 700;
      color: #fff;
      background: var(--gradient);
      border: none;
      box-shadow: 0 10px 30px rgba(47,107,255,0.35);
      text-decoration: none;
      cursor: pointer;
      transition: transform .2s, box-shadow .2s;
    }
    .btn:active { transform: scale(0.96); }
    .btn-outline {
      background: rgba(255,255,255,0.8);
      color: var(--primary);
      border: 1px solid rgba(47,107,255,0.2);
      box-shadow: var(--shadow);
      margin-left: 10px;
    }

    /* Stats */
    .stats {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
      margin-bottom: 34px;
    }
    .stat-card {
      background: var(--surface);
      border: 1px solid rgba(255,255,255,0.7);
      border-radius: var(--radius);
      padding: 16px;
      text-align: center;
      box-shadow: var(--shadow);
      backdrop-filter: blur(10px);
    }
    .stat-num {
      font-size: 24px;
      font-weight: 800;
      background: var(--gradient);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }
    .stat-label { font-size: 13px; color: var(--text-secondary); margin-top: 4px; }

    /* Sections */
    section { margin-bottom: 42px; }
    .section-head {
      text-align: center;
      margin-bottom: 22px;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 12px;
      font-weight: 700;
      color: #fff;
      background: var(--gradient);
      margin-bottom: 10px;
    }
    h2 {
      font-size: 24px;
      font-weight: 800;
      margin: 0 0 8px;
      line-height: 1.25;
    }
    h2 .highlight {
      background: var(--gradient);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-secondary);
      margin: 0;
    }

    /* Capability cards */
    .cap-card {
      background: var(--surface);
      border: 1px solid rgba(255,255,255,0.7);
      border-radius: var(--radius);
      padding: 24px 20px 26px;
      margin-bottom: 18px;
      box-shadow: var(--shadow);
      backdrop-filter: blur(12px);
      position: relative;
      overflow: hidden;
    }
    .cap-card::before {
      content: "";
      position: absolute;
      top: 0; left: 0; right: 0;
      height: 4px;
      background: var(--gradient);
    }
    .cap-header {
      display: flex;
      align-items: center;
      gap: 14px;
      margin-bottom: 14px;
    }
    .cap-icon {
      width: 58px; height: 58px;
      border-radius: 16px;
      display: grid;
      place-items: center;
      background: var(--gradient-soft);
      flex-shrink: 0;
    }
    .cap-icon svg { width: 30px; height: 30px; }
    .cap-title { font-size: 21px; font-weight: 800; margin: 0; }
    .cap-sub { font-size: 15px; color: var(--primary); font-weight: 600; }
    .cap-desc { font-size: 15px; line-height: 1.6; color: var(--text-secondary); margin: 0; }

    /* Capability feature highlights (larger, mobile-friendly) */
    .cap-features {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 10px;
      margin-top: 18px;
    }
    .cap-feature {
      display: flex;
      align-items: center;
      gap: 9px;
      font-size: 15px;
      font-weight: 600;
      color: var(--text);
      background: var(--gradient-soft);
      border: 1px solid rgba(47,107,255,0.14);
      border-radius: 13px;
      padding: 12px 13px;
      line-height: 1.35;
    }
    .cap-feature svg {
      width: 18px; height: 18px; flex-shrink: 0;
      color: var(--primary);
    }

    /* Capability card platform chips */
    .cap-platforms {
      margin-top: 14px;
      padding-top: 14px;
      border-top: 1px solid rgba(47,107,255,0.10);
    }
    .cap-platforms-label {
      display: block;
      font-size: 13px;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 10px;
    }
    .cap-platforms-list {
      display: flex;
      flex-wrap: wrap;
      gap: 9px;
    }
    .cap-platforms-list img {
      width: 28px;
      height: 28px;
      border-radius: 8px;
      background: #fff;
      padding: 4px;
      object-fit: contain;
      box-shadow: 0 2px 8px rgba(0,0,0,0.08);
      display: block;
    }

    /* WeCan section — 我们能帮你 (redesigned: outcome-first editorial) */
    .wecan-grid {
      display: grid; gap: 16px;
    }
    @media (min-width: 680px) { .wecan-grid { grid-template-columns: 1fr 1fr; } }

    .wecan-card {
      position: relative;
      background: var(--surface-solid);
      border: 1px solid rgba(47,107,255,0.08);
      border-radius: 22px;
      padding: 22px 22px 20px;
      box-shadow: 0 10px 30px rgba(20,30,60,0.06);
      overflow: hidden;
    }
    /* large faint index number — editorial watermark */
    .wecan-idx {
      position: absolute;
      top: 6px; right: 14px;
      font-size: 52px; font-weight: 800; line-height: 1;
      color: rgba(47,107,255,0.09);
      font-variant-numeric: tabular-nums;
      letter-spacing: -1px;
      pointer-events: none; z-index: 0;
    }
    .wecan-cat {
      position: relative; z-index: 1;
      display: inline-block;
      font-size: 12.5px; font-weight: 700;
      color: var(--primary);
      background: rgba(47,107,255,0.08);
      padding: 5px 11px;
      border-radius: 20px;
      margin-bottom: 13px;
    }
    .wecan-title {
      position: relative; z-index: 1;
      font-size: 19px; font-weight: 800;
      color: var(--text);
      margin: 0 0 7px;
      line-height: 1.38;
      letter-spacing: -0.2px;
      padding-right: 46px;
    }
    .wecan-desc {
      position: relative; z-index: 1;
      font-size: 14px; color: var(--text-secondary);
      line-height: 1.65; margin: 0 0 20px;
    }
    .wecan-steps {
      display: flex; align-items: flex-start;
      padding-top: 16px;
      border-top: 1px solid rgba(47,107,255,0.10);
    }
    .wecan-step {
      flex: 1; display: flex; flex-direction: column; align-items: center;
      gap: 9px; position: relative; min-width: 0;
    }
    .wecan-step:not(:last-child)::after {
      content: "";
      position: absolute;
      top: 17px; left: 50%;
      width: 100%; height: 2px;
      background: rgba(47,107,255,0.16);
      z-index: 0;
    }
    .wecan-dot {
      width: 34px; height: 34px; border-radius: 50%;
      background: #fff;
      border: 1.5px solid rgba(47,107,255,0.22);
      color: var(--primary);
      font-size: 14px; font-weight: 800;
      display: grid; place-items: center;
      position: relative; z-index: 1;
      flex-shrink: 0;
    }
    .wecan-label {
      font-size: 13px; color: var(--text-secondary);
      line-height: 1.45; text-align: center;
    }
    /* the final step = the payoff, accented */
    .wecan-step.is-result .wecan-dot {
      background: var(--gradient);
      border-color: transparent;
      color: #fff;
      box-shadow: 0 6px 16px rgba(47,107,255,0.3);
    }
    .wecan-step.is-result .wecan-label {
      color: var(--primary); font-weight: 700;
    }

    /* Case studies */
    .cases { display: grid; gap: 14px; }
    .case-card {
      background: var(--surface);
      border-radius: var(--radius);
      padding: 18px;
      border: 1px solid rgba(255,255,255,0.7);
      box-shadow: var(--shadow);
      backdrop-filter: blur(12px);
      overflow: hidden;
    }
    .case-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
    .case-tag {
      font-size: 12px; font-weight: 700; color: #fff;
      background: var(--gradient); padding: 4px 11px; border-radius: 16px;
    }
    .case-client { font-size: 13px; color: var(--text-secondary); }
    .case-title { font-size: 18px; font-weight: 800; margin: 0 0 6px; }
    .case-challenge { font-size: 15px; line-height: 1.7; color: var(--text-secondary); margin: 0 0 12px; }
    .case-plan {
      display: flex; align-items: center; gap: 8px;
      font-size: 13px; font-weight: 600; color: var(--primary);
      background: rgba(47,107,255,0.06); padding: 9px 11px; border-radius: 10px; margin-bottom: 12px;
    }
    .case-plan svg { flex-shrink: 0; width: 16px; height: 16px; }

    /* Case real ad screenshot */
    .case-shot {
      width: 100%; margin: 0 0 14px;
      background: #fff;
      border-radius: 12px; overflow: hidden;
      box-shadow: 0 4px 14px rgba(47,107,255,0.12);
    }
    .case-shot img { width: 100%; display: block; }

    /* Case placeholder (待补充广告图) */
    .case-placeholder {
      width: 100%; margin: 0 0 14px;
      border-radius: 10px; overflow: hidden;
      border: 1px dashed rgba(47,107,255,0.28);
      background: linear-gradient(135deg, #eef4ff, #e3ecff);
      min-height: 230px;
      display: flex; flex-direction: column; gap: 8px;
      align-items: center; justify-content: center;
      color: var(--primary);
    }
    .case-placeholder svg { width: 40px; height: 40px; opacity: 0.5; }
    .case-placeholder span { font-size: 13px; font-weight: 600; color: var(--text-secondary); }

    /* Case exposure */
    .case-exposure {
      display: flex; align-items: baseline; gap: 8px;
      background: rgba(47,107,255,0.06);
      border-radius: 12px; padding: 12px 14px; margin-bottom: 12px;
    }
    .expo-num { font-size: 26px; font-weight: 800; background: var(--gradient); -webkit-background-clip: text; background-clip: text; color: transparent; }
    .expo-label { font-size: 13px; color: var(--text-secondary); }

    /* Testimonials */
    .testi-grid { display: grid; gap: 12px; }
    .testi-card {
      background: var(--surface);
      border-radius: var(--radius);
      padding: 18px;
      border: 1px solid rgba(255,255,255,0.7);
      box-shadow: var(--shadow);
      backdrop-filter: blur(12px);
      position: relative;
    }
    .testi-quote {
      font-size: 15px; color: var(--text); line-height: 1.7; margin: 0 0 14px;
    }
    .testi-quote .q {
      color: var(--primary); font-weight: 800; font-size: 20px; margin-right: 2px; vertical-align: -2px;
    }
    .testi-foot { display: flex; align-items: center; gap: 10px; }
    .testi-avatar {
      width: 42px; height: 42px; border-radius: 50%; flex-shrink: 0;
      object-fit: cover; border: 2px solid #fff; display: block;
      box-shadow: 0 6px 16px rgba(47,107,255,0.25);
    }
    .testi-meta { display: flex; flex-direction: column; }
    .testi-name { font-size: 14px; font-weight: 700; color: var(--text); }
    .testi-role { font-size: 12px; color: var(--text-secondary); margin-top: 1px; }
    .testi-tag {
      margin-left: auto; font-size: 12px; font-weight: 700; color: var(--primary);
      background: rgba(47,107,255,0.08); padding: 4px 9px; border-radius: 14px; white-space: nowrap;
    }

    /* Conversion path */
    .path-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 10px;
    }
    .path-item {
      background: var(--surface);
      border-radius: 16px;
      padding: 16px 12px;
      text-align: center;
      border: 1px solid rgba(255,255,255,0.7);
      box-shadow: var(--shadow);
      backdrop-filter: blur(10px);
    }
    .path-item svg { width: 32px; height: 32px; margin-bottom: 8px; }
    .path-item div { font-size: 14px; font-weight: 700; color: var(--text); }

    /* CTA section */
    .cta {
      background: var(--gradient);
      border-radius: var(--radius);
      padding: 32px 22px;
      text-align: center;
      color: #fff;
      box-shadow: var(--shadow-lg);
      position: relative;
      overflow: hidden;
    }
    .cta::before {
      content: "";
      position: absolute;
      width: 220px; height: 220px;
      background: rgba(255,255,255,0.12);
      border-radius: 50%;
      top: -80px; right: -60px;
    }
    .cta h3 { font-size: 22px; font-weight: 800; margin: 0 0 8px; position: relative; z-index: 1; }
    .cta p { font-size: 15px; opacity: 0.95; margin: 0; position: relative; z-index: 1; }

    /* Footer */
    footer {
      text-align: center;
      padding: 28px 18px 100px;
      color: var(--text-secondary);
      font-size: 13px;
    }
    footer a { color: var(--primary); text-decoration: none; }

    /* Reveal animation */
    .reveal {
      opacity: 0;
      transform: translateY(28px);
      transition: opacity .7s ease, transform .7s ease;
    }
    .reveal.show { opacity: 1; transform: translateY(0); }

    /* Platforms */
    .platform-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 10px;
      margin-top: 22px;
    }
    .platform-item {
      display: flex; flex-direction: column; align-items: center; gap: 8px;
      padding: 15px 4px 13px;
      background: var(--surface);
      border: 1px solid rgba(47,107,255,0.10);
      border-radius: 15px;
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      box-shadow: 0 4px 16px rgba(47,107,255,0.08);
    }
    .platform-logo {
      width: 46px; height: 46px; border-radius: 12px; overflow: hidden;
      background: #fff; display: flex; align-items: center; justify-content: center;
      padding: 7px; box-shadow: 0 4px 14px rgba(0,0,0,0.10);
    }
    .platform-logo img { width: 100%; height: 100%; object-fit: contain; object-position: center; display: block; }
    .pf-name { font-size: 12px; color: var(--text-secondary); text-align: center; line-height: 1.25; }

    /* Delivery steps link (timeline) */
    .dl-flow { position: relative; margin-top: 8px; }
    .dl-item {
      display: flex;
      gap: 16px;
      align-items: stretch;
      padding-bottom: 22px;
    }
    .dl-item:last-child { padding-bottom: 0; }
    .dl-rail {
      position: relative;
      flex-shrink: 0;
      width: 54px;
      display: flex;
      flex-direction: column;
      align-items: center;
    }
    .dl-dot {
      width: 54px; height: 54px;
      border-radius: 17px;
      background: var(--gradient);
      color: #fff;
      display: grid; place-items: center;
      box-shadow: 0 10px 24px rgba(47,107,255,0.34);
      z-index: 1;
      flex-shrink: 0;
    }
    .dl-dot svg { width: 27px; height: 27px; }
    .dl-line {
      position: absolute;
      top: 54px; bottom: -22px;
      left: 50%; transform: translateX(-50%);
      width: 3px;
      background: linear-gradient(180deg, var(--primary), var(--accent));
      opacity: 0.32;
      border-radius: 3px;
    }
    .dl-item:last-child .dl-line { display: none; }
    .dl-card {
      flex: 1;
      background: var(--surface);
      border: 1px solid rgba(255,255,255,0.7);
      border-radius: var(--radius);
      padding: 16px 18px;
      box-shadow: var(--shadow);
      backdrop-filter: blur(10px);
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .dl-card h4 {
      font-size: 17px; font-weight: 800; margin: 0 0 5px;
      display: flex; align-items: baseline; gap: 8px;
    }
    .dl-card h4 .dl-step {
      font-size: 13px; font-weight: 800; color: var(--primary);
      background: rgba(47,107,255,0.10);
      padding: 2px 9px; border-radius: 10px; flex-shrink: 0;
    }
    .dl-card p { font-size: 14px; color: var(--text-secondary); margin: 0; line-height: 1.65; }