/* ============================================================
   FDE Landing · Shared Design System  ·  DARK / OLED 暗金主题
   深蓝底 + 金主调 + 天蓝点缀，对齐 FDE 商品卡（OLED 杂志风）
   与 workflow-kit 浅色 landing 形成品牌区隔
   Outfit / JetBrains Mono · 两个 FDE 服务页 (出诊 199 / 带做 999) 共用
   ============================================================ */

/* ================= RESET ================= */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Outfit', system-ui, -apple-system, sans-serif;
  background: var(--canvas);
  color: var(--ink);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss01","cv11";
}
a { text-decoration: none; color: inherit; }
button { font-family: inherit; }

/* ================= TOKENS ================= */
:root {
  --canvas: #151C2A;          /* 深石板蓝（柔和的暗，不刺眼） */
  --canvas-2: #1B2335;        /* 略亮的底，用于分段 */
  --surface: #1F2A3C;         /* 卡片面 */
  --surface-soft: #1A2334;    /* 次级面 */
  --surface-glass: rgba(255,255,255,0.045);
  --ink: #F3F6FB;             /* 主文本 */
  --ink-soft: #E4EAF3;
  --ink-2: #C8D2E0;
  --secondary: #97A2B6;       /* 次文本 */
  --tertiary: #6A7589;
  --quaternary: #3A4456;
  --border: rgba(255,255,255,0.1);
  --border-strong: rgba(255,255,255,0.14);
  --border-solid: rgba(255,255,255,0.1);
  /* 金主调 */
  --accent: #FBBF24;
  --accent-mid: #F59E0B;
  --accent-bright: #FCD34D;
  --accent-wash: rgba(245,158,11,0.12);
  --accent-deep: #B7791F;
  /* 天蓝次调 */
  --sky: #38BDF8;
  --sky-mid: #0EA5E9;
  --sky-wash: rgba(56,189,248,0.12);
  --danger: #F87171;
  --danger-wash: rgba(248,113,113,0.12);
  --warn: #FBBF24;
  --warn-wash: rgba(245,158,11,0.1);
  --good: #34D399;
  --good-wash: rgba(52,211,153,0.12);
  --spring: cubic-bezier(0.32, 0.72, 0, 1);
  --spring-soft: cubic-bezier(0.16, 1, 0.3, 1);
  --container: 1200px;
  --mono: 'JetBrains Mono', ui-monospace, monospace;
  --offer-bar-h: 44px;
  --gold: #F59E0B;
  --gold-light: #FBBF24;
  --gold-wash: rgba(245,158,11,0.12);
}

.container { max-width: var(--container); margin: 0 auto; padding: 0 28px; position: relative; }

/* ================= OFFER BAR ================= */
.offer-bar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 110;
  height: var(--offer-bar-h);
  background: #0F1521;
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.82rem; font-weight: 500;
  border-bottom: 1px solid rgba(245,158,11,0.16);
  overflow: hidden;
}
.offer-bar::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(245,158,11,0.18), transparent 55%),
              radial-gradient(ellipse at 75% 50%, rgba(56,189,248,0.10), transparent 55%);
  pointer-events: none;
}
.offer-bar-inner {
  position: relative; z-index: 1;
  display: flex; align-items: center; gap: 14px;
  padding: 0 24px;
}
.offer-bar .live-dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--accent-bright);
  box-shadow: 0 0 0 0 rgba(251,191,36,0.7);
  animation: livepulse 2s infinite;
}
@keyframes livepulse {
  0% { box-shadow: 0 0 0 0 rgba(251,191,36,0.6); }
  70% { box-shadow: 0 0 0 8px rgba(251,191,36,0); }
  100% { box-shadow: 0 0 0 0 rgba(251,191,36,0); }
}
.offer-bar-text { color: #D4DAE6; letter-spacing: 0.01em; }
.offer-bar-text .accent { color: var(--accent-bright); font-weight: 700; }
@media (max-width: 640px) {
  .offer-bar-inner { gap: 8px; padding: 0 12px; }
  .offer-bar-text .hide-xs { display: none; }
}

/* ================= NAV ================= */
nav {
  position: fixed; top: calc(var(--offer-bar-h) + 16px); left: 50%; transform: translateX(-50%);
  z-index: 100;
  background: rgba(30,40,60,0.74);
  backdrop-filter: blur(22px) saturate(160%);
  -webkit-backdrop-filter: blur(22px) saturate(160%);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 9999px;
  padding: 7px 8px 7px 26px;
  display: flex; align-items: center; gap: 28px;
  box-shadow:
    0 1px 0 rgba(255,255,255,0.05) inset,
    0 8px 30px rgba(0,0,0,0.5);
  transition: box-shadow 0.5s var(--spring), border-color 0.5s;
}
nav.scrolled { border-color: rgba(245,158,11,0.22); box-shadow: 0 1px 0 rgba(255,255,255,0.05) inset, 0 10px 34px rgba(0,0,0,0.6); }
.nav-brand {
  font-weight: 800; font-size: 0.95rem; letter-spacing: -0.025em;
  white-space: nowrap; display: flex; align-items: center; gap: 7px;
  color: var(--ink);
}
.nav-brand-mark {
  width: 18px; height: 18px; border-radius: 5px;
  background: linear-gradient(135deg, var(--accent-bright), var(--accent-mid));
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 0 12px rgba(245,158,11,0.4);
}
.nav-brand-mark svg { width: 11px; height: 11px; stroke: #0A0E17; }
.nav-links { display: flex; gap: 24px; align-items: center; }
.nav-links a {
  font-size: 0.8rem; font-weight: 500; color: var(--secondary);
  transition: color 0.3s var(--spring);
}
.nav-links a:hover { color: var(--ink); }
.nav-cta {
  display: inline-flex; align-items: center; gap: 6px;
  background: linear-gradient(135deg, var(--accent-bright), var(--accent-mid));
  color: #0A0E17 !important;
  padding: 8px 18px; border-radius: 9999px;
  font-weight: 700; font-size: 0.8rem;
  border: none; cursor: pointer;
  font-family: inherit;
  transition: transform 0.5s var(--spring), box-shadow 0.5s var(--spring);
  box-shadow: 0 2px 14px rgba(245,158,11,0.35);
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 6px 22px rgba(245,158,11,0.5); }
.nav-cta:active { transform: scale(0.97); }

/* ================= REVEAL ================= */
.reveal {
  opacity: 0; transform: translateY(22px); filter: blur(4px);
  transition: opacity 0.9s var(--spring-soft), transform 0.9s var(--spring-soft), filter 0.9s var(--spring-soft);
}
.reveal.visible { opacity: 1; transform: translateY(0); filter: blur(0); }

/* ================= HERO ================= */
.hero {
  position: relative;
  padding: calc(var(--offer-bar-h) + 140px) 0 96px;
  background: linear-gradient(180deg, #1E2840 0%, #18202F 42%, var(--canvas) 100%);
  overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(900px 480px at 18% 14%, rgba(245,158,11,0.14), transparent 60%),
    radial-gradient(800px 420px at 84% 26%, rgba(56,189,248,0.12), transparent 58%);
}
.hero::after {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 900px 550px at 50% 18%, #000 35%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 900px 550px at 50% 18%, #000 35%, transparent 75%);
}
.hero-grid {
  position: relative; z-index: 1;
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 64px; align-items: center;
}
.hero-left { max-width: 620px; }

/* ===== 品牌锚点卡 ===== */
.vow-card {
  position: relative;
  margin: 30px 0 40px;
  padding: 1px;
  border-radius: 24px;
  background: linear-gradient(135deg, rgba(245,158,11,0.6) 0%, rgba(251,191,36,0.22) 35%, rgba(56,189,248,0.12) 100%);
  box-shadow:
    0 24px 60px -28px rgba(245,158,11,0.4),
    0 2px 10px -2px rgba(0,0,0,0.5);
}
.vow-card-inner {
  position: relative;
  background: linear-gradient(180deg, #232E45 0%, #1A2436 100%);
  border-radius: 23px;
  padding: 26px 30px 28px;
  overflow: hidden;
}
.vow-card-inner::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 85% 0%, rgba(245,158,11,0.14) 0%, transparent 55%),
    radial-gradient(circle at 0% 100%, rgba(56,189,248,0.08) 0%, transparent 50%);
  pointer-events: none;
}
.vow-card-eyebrow {
  position: relative;
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--mono);
  font-size: 0.83rem; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent-bright);
  margin-bottom: 12px;
}
.vow-card-eyebrow svg { opacity: 0.9; }
.vow-card-title {
  position: relative;
  font-size: clamp(1.46rem, 2.94vw, 1.9rem);
  font-weight: 800; line-height: 1.36;
  letter-spacing: -0.024em;
  color: var(--ink);
}
.vow-card-title .vow-final {
  position: relative;
  color: var(--accent-bright);
  white-space: nowrap;
}
.vow-card-title .vow-final::after {
  content: '';
  position: absolute;
  left: -2%; right: -2%; bottom: 6%;
  height: 0.22em; z-index: -1;
  background: linear-gradient(90deg, rgba(245,158,11,0.4), rgba(251,191,36,0.15));
  border-radius: 4px;
}
.vow-card-meta {
  position: relative;
  margin-top: 12px;
  font-size: 1.02rem; line-height: 1.6;
  color: var(--secondary);
}
.vow-card-meta strong { color: var(--ink); font-weight: 600; }
@media (max-width: 560px) {
  .vow-card-inner { padding: 22px 22px 24px; }
  .vow-card-title { font-size: 1.32rem; line-height: 1.38; }
  .vow-card-meta { font-size: 0.96rem; }
  .vow-card-eyebrow { font-size: 0.76rem; }
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 0.88rem; font-weight: 600; letter-spacing: 0.08em;
  color: var(--accent-bright);
  background: rgba(245,158,11,0.08);
  border: 1px solid rgba(245,158,11,0.22);
  padding: 7px 16px 7px 12px; border-radius: 9999px;
  margin-bottom: 30px;
  box-shadow: 0 0 0 1px rgba(255,255,255,0.02) inset, 0 4px 18px -6px rgba(245,158,11,0.3);
}
.hero-eyebrow .pulse {
  width: 6px; height: 6px; background: var(--accent-bright); border-radius: 50%;
  animation: pulse 2.4s ease-in-out infinite;
  box-shadow: 0 0 0 3px rgba(245,158,11,0.18);
}
.hero-eyebrow .sep { width: 1px; height: 10px; background: rgba(245,158,11,0.35); }
.hero-eyebrow .count { color: var(--ink); font-weight: 700; letter-spacing: 0.02em; text-transform: none; font-size: 0.9rem; }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:.35;transform:scale(.75)} }

.hero h1 {
  font-size: clamp(3.2rem, 6.5vw, 5.1rem);
  font-weight: 900; line-height: 1.04;
  letter-spacing: -0.037em; margin-bottom: 28px;
  color: #FBFCFE;
}
.hero h1 .line { display: block; }
.hero h1 .mark {
  position: relative; color: var(--accent-bright);
  white-space: nowrap;
}
.hero h1 .mark::after {
  content: ''; position: absolute;
  left: -2%; right: -2%; bottom: 4%;
  height: 0.22em; z-index: -1;
  background: linear-gradient(90deg, rgba(245,158,11,0.35), rgba(251,191,36,0.12));
  border-radius: 4px;
}
.hero-sub {
  font-size: 1.32rem; color: var(--secondary);
  max-width: 60ch; line-height: 1.66; margin-bottom: 38px;
}
.hero-sub strong { color: var(--ink); font-weight: 600; }
.hero-sub .hl {
  background: linear-gradient(180deg, transparent 62%, rgba(245,158,11,0.28) 62%);
  color: var(--ink); font-weight: 600; padding: 0 2px;
}

/* — CTA row — */
.cta-row { display: flex; gap: 14px; flex-wrap: wrap; align-items: center; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 14px;
  background: linear-gradient(135deg, var(--accent-bright) 0%, var(--accent-mid) 100%);
  color: #0A0E17;
  padding: 15px 17px 15px 28px; border-radius: 9999px;
  font-size: 0.96rem; font-weight: 700; border: none; cursor: pointer;
  transition: transform 0.5s var(--spring), box-shadow 0.5s var(--spring);
  box-shadow:
    0 1px 0 rgba(255,255,255,0.25) inset,
    0 12px 32px -8px rgba(245,158,11,0.5),
    0 2px 8px rgba(245,158,11,0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 1px 0 rgba(255,255,255,0.3) inset, 0 18px 44px -8px rgba(245,158,11,0.6), 0 4px 12px rgba(245,158,11,0.35); }
.btn-primary:active { transform: scale(0.98); }
.btn-primary .price-badge {
  background: rgba(10,14,23,0.22);
  border: 1px solid rgba(10,14,23,0.18);
  padding: 4px 11px; border-radius: 9999px;
  font-size: 0.78rem; font-weight: 700; letter-spacing: -0.01em;
  font-family: var(--mono);
}
.btn-primary .arrow {
  width: 34px; height: 34px; border-radius: 50%;
  background: rgba(10,14,23,0.2);
  display: flex; align-items: center; justify-content: center;
  transition: transform 0.5s var(--spring), background 0.5s;
}
.btn-primary .arrow svg { stroke: #0A0E17; }
.btn-primary:hover .arrow { transform: translateX(3px); background: rgba(10,14,23,0.3); }

.btn-ghost {
  display: inline-flex; align-items: center; gap: 10px;
  background: rgba(255,255,255,0.04);
  backdrop-filter: blur(12px);
  color: var(--ink);
  padding: 15px 22px; border-radius: 9999px;
  font-size: 0.92rem; font-weight: 600;
  border: 1px solid rgba(255,255,255,0.12); cursor: pointer;
  transition: transform 0.4s var(--spring), background 0.4s, border-color 0.4s;
}
.btn-ghost:hover { background: rgba(255,255,255,0.08); border-color: rgba(245,158,11,0.4); transform: translateY(-1px); }

.btn-accent {
  display: inline-flex; align-items: center; gap: 14px;
  background: linear-gradient(135deg, var(--accent-bright) 0%, var(--accent-mid) 100%);
  color: #0A0E17;
  padding: 16px 20px 16px 32px; border-radius: 9999px;
  font-size: 1.02rem; font-weight: 700;
  border: none; cursor: pointer;
  transition: transform 0.5s var(--spring), box-shadow 0.5s var(--spring);
  box-shadow:
    0 1px 0 rgba(255,255,255,0.3) inset,
    0 8px 28px rgba(245,158,11,0.5),
    0 2px 8px rgba(245,158,11,0.3);
}
.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow:
    0 1px 0 rgba(255,255,255,0.35) inset,
    0 14px 40px rgba(245,158,11,0.62),
    0 4px 12px rgba(245,158,11,0.4);
}
.btn-accent:active { transform: scale(0.98); }
.btn-accent .arrow {
  width: 34px; height: 34px; border-radius: 50%;
  background: rgba(10,14,23,0.22);
  display: flex; align-items: center; justify-content: center;
  transition: transform 0.5s var(--spring);
}
.btn-accent .arrow svg { stroke: #0A0E17; }
.btn-accent:hover .arrow { transform: translateX(3px); }

/* — Hero trust row — */
.hero-trust {
  display: flex; align-items: center; gap: 20px;
  margin-top: 24px; flex-wrap: wrap;
  font-size: 0.82rem; color: var(--secondary);
}
.hero-trust-item { display: inline-flex; align-items: center; gap: 6px; }
.hero-trust-item svg { color: var(--good); flex-shrink: 0; }
.hero-trust .sep { width: 1px; height: 12px; background: var(--quaternary); }

/* — Hero right: offer card — */
.hero-right { position: relative; }
.offer-card {
  position: relative;
  background: linear-gradient(180deg, rgba(40,52,76,0.92) 0%, rgba(30,40,59,0.94) 100%);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 24px;
  padding: 26px 26px 22px;
  box-shadow:
    0 1px 0 rgba(255,255,255,0.05) inset,
    0 30px 70px -28px rgba(0,0,0,0.7),
    0 0 40px -10px rgba(245,158,11,0.12);
  transition: transform 0.8s var(--spring);
}
.offer-card:hover { transform: translateY(-3px) rotate(-0.3deg); }
.offer-card-head {
  margin-bottom: 20px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
}
.offer-card-eyebrow {
  display: inline-block;
  font-size: 0.68rem; font-weight: 700; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--accent-bright);
  background: var(--accent-wash);
  padding: 4px 10px; border-radius: 9999px;
  margin-bottom: 12px;
  border: 1px solid rgba(245,158,11,0.25);
}
.offer-card-title {
  font-size: 1.35rem; font-weight: 800;
  letter-spacing: -0.025em; color: var(--ink);
  margin-bottom: 8px; line-height: 1.2;
}
.offer-card-desc {
  font-size: 0.82rem; color: var(--secondary);
  line-height: 1.55;
}
.rights-list {
  display: flex; flex-direction: column; gap: 14px;
  margin-bottom: 18px;
}
.rights-item { display: flex; gap: 12px; align-items: flex-start; }
.rights-check {
  flex-shrink: 0; margin-top: 2px;
  color: var(--accent-bright);
  background: var(--accent-wash);
  border-radius: 50%;
  padding: 3px; width: 22px; height: 22px;
  border: 1px solid rgba(245,158,11,0.3);
}
.rights-text { display: flex; flex-direction: column; gap: 3px; min-width: 0; flex: 1; }
.rights-name {
  font-size: 0.88rem; font-weight: 700;
  color: var(--ink); letter-spacing: -0.005em;
  line-height: 1.35;
}
.rights-sub {
  font-size: 0.74rem; color: var(--secondary);
  line-height: 1.5; letter-spacing: 0.005em;
}
.offer-pay {
  background: linear-gradient(135deg, rgba(245,158,11,0.16), rgba(245,158,11,0.04));
  border: 1px solid rgba(245,158,11,0.3);
  border-radius: 16px;
  padding: 20px 22px; position: relative; overflow: hidden;
  color: #fff;
}
.offer-pay::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(ellipse at 80% 30%, rgba(245,158,11,0.2), transparent 55%);
}
.offer-pay-row {
  display: flex; justify-content: space-between; align-items: flex-end;
  position: relative; z-index: 1;
}
.offer-pay-label {
  font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em;
  color: var(--accent-bright); font-weight: 700;
  margin-bottom: 6px;
}
.offer-pay-amount {
  font-size: 2.85rem; font-weight: 900; line-height: 1;
  letter-spacing: -0.04em; color: var(--accent-bright);
  font-feature-settings: "tnum";
  text-shadow: 0 0 24px rgba(245,158,11,0.4);
}
.offer-pay-amount .sym {
  font-size: 0.48em; vertical-align: super; margin-right: 3px;
  font-weight: 700; color: var(--accent-bright);
}
.offer-pay-amount .per { font-size: 0.32em; vertical-align: baseline; margin-left: 4px; font-weight: 600; color: var(--tertiary); letter-spacing: 0; text-shadow: none; }
.offer-sub {
  margin-top: 14px; font-size: 0.72rem;
  color: var(--tertiary); text-align: center;
  line-height: 1.5;
}
.offer-sub .good { color: var(--good); font-weight: 600; }

/* Floating accents around offer card */
.float-tag {
  position: absolute; padding: 8px 14px;
  background: #232E45; border-radius: 9999px;
  font-size: 0.74rem; font-weight: 600; color: var(--ink);
  box-shadow: 0 14px 36px -12px rgba(0,0,0,0.7), 0 0 0 1px rgba(245,158,11,0.25);
  display: inline-flex; align-items: center; gap: 8px;
  animation: float 6s ease-in-out infinite;
}
.float-tag-1 { top: -18px; left: -26px; animation-delay: 0s; }
.float-tag-2 { bottom: -14px; right: -20px; animation-delay: -3s; }
.float-tag svg { color: var(--good); }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }

/* ================= WHAT IS FDE (定义带) ================= */
.fde-def-section { background: var(--canvas); padding: 0; }
.fde-def {
  display: flex; align-items: center; gap: 30px;
  max-width: 980px; margin: -36px auto 0; position: relative; z-index: 2;
  background: linear-gradient(135deg, rgba(245,158,11,0.13), var(--surface) 55%);
  border: 1px solid rgba(245,158,11,0.28);
  border-radius: 22px; padding: 30px 36px;
  box-shadow: 0 30px 70px -36px rgba(0,0,0,0.55), 0 0 40px -16px rgba(245,158,11,0.18);
}
.fde-def-badge {
  flex-shrink: 0; width: 90px; height: 90px; border-radius: 20px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-weight: 800; font-size: 1.5rem; letter-spacing: -0.04em;
  color: #0A0E17;
  background: linear-gradient(135deg, var(--accent-bright), var(--accent-mid));
  box-shadow: 0 0 28px rgba(245,158,11,0.4), inset 0 1px 0 rgba(255,255,255,0.35);
}
.fde-def-eyebrow {
  font-family: var(--mono); font-size: 0.7rem; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent-bright);
  margin-bottom: 8px;
}
.fde-def-title { font-size: 1.28rem; font-weight: 800; letter-spacing: -0.02em; line-height: 1.32; margin-bottom: 10px; color: var(--ink); }
.fde-def-title .mark { color: var(--accent-bright); }
.fde-def-desc { font-size: 0.95rem; color: var(--secondary); line-height: 1.72; }
.fde-def-desc strong { color: var(--ink); font-weight: 600; }
@media (max-width: 720px) {
  .fde-def { flex-direction: column; align-items: flex-start; gap: 18px; padding: 26px 24px; margin-top: -20px; }
  .fde-def-badge { width: 62px; height: 62px; font-size: 1.15rem; border-radius: 16px; }
  .fde-def-title { font-size: 1.1rem; }
}

/* ================= SECTIONS (shared) ================= */
.section { padding: 120px 0; position: relative; }
.section-header { margin-bottom: 60px; max-width: 680px; }
.section-header.centered { margin-left: auto; margin-right: auto; text-align: center; }
.section-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 0.7rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.14em; color: var(--accent-bright);
  margin-bottom: 16px;
}
.section-eyebrow::before { content: ''; width: 22px; height: 1px; background: var(--accent); opacity: 0.6; }
.section-header.centered .section-eyebrow::before { display: none; }
.section-header h2 {
  font-size: clamp(2rem, 4.2vw, 3.1rem);
  font-weight: 800; line-height: 1.06;
  letter-spacing: -0.033em; margin-bottom: 16px;
  color: #FBFCFE;
}
.section-header h2 .mark { color: var(--accent-bright); }
.section-header p {
  font-size: 1.06rem; color: var(--secondary);
  max-width: 55ch; line-height: 1.65;
}
.section-header.centered p { margin-left: auto; margin-right: auto; }

/* ================= COST SECTION ================= */
.cost-section { background: var(--canvas); }
.cost-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 20px; }
.cost-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 36px;
  position: relative; overflow: hidden;
  transition: transform 0.6s var(--spring), box-shadow 0.6s var(--spring), border-color 0.6s;
}
.cost-card:hover { transform: translateY(-3px); border-color: rgba(248,113,113,0.3); box-shadow: 0 24px 50px -24px rgba(0,0,0,0.6); }
.cost-card-big { grid-row: span 2; display: flex; flex-direction: column; justify-content: space-between; }
.cost-label {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 0.68rem; font-weight: 700;
  text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--danger); background: var(--danger-wash);
  padding: 5px 11px; border-radius: 9999px;
  margin-bottom: 22px;
  border: 1px solid rgba(248,113,113,0.25);
}
.cost-card h3 {
  font-size: 1.35rem; font-weight: 800; letter-spacing: -0.02em;
  margin-bottom: 10px; line-height: 1.25; color: var(--ink);
}
.cost-card .cost-desc { font-size: 0.93rem; color: var(--secondary); line-height: 1.65; max-width: 42ch; }
.cost-counter {
  margin-top: 28px; padding-top: 24px;
  border-top: 1px dashed var(--border-solid);
  display: flex; align-items: baseline; gap: 10px;
}
.cost-counter-num {
  font-family: var(--mono); font-size: 2.6rem; font-weight: 800;
  color: var(--danger); letter-spacing: -0.03em; line-height: 1;
  font-variant-numeric: tabular-nums;
}
.cost-counter-label { font-size: 0.82rem; color: var(--tertiary); }
.cost-small { padding: 30px; }
.cost-small h3 { font-size: 1.1rem; margin-bottom: 8px; }
.cost-small .cost-desc { font-size: 0.88rem; }

/* ================= STAGES (process steps) ================= */
.stages-intro { padding: 96px 0 8px; }
.stage-band { padding: 72px 0; position: relative; }
.stage-band::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 60%;
  pointer-events: none; opacity: 0.5;
}
@media (max-width: 880px) { .stage-band { padding: 56px 0; } }
.stage-band[data-stage="01"]::before { background: radial-gradient(ellipse 60% 100% at 30% 0%, rgba(56,189,248,0.12), transparent 70%); }
.stage-band[data-stage="02"]::before { background: radial-gradient(ellipse 60% 100% at 30% 0%, rgba(34,211,238,0.12), transparent 70%); }
.stage-band[data-stage="03"]::before { background: radial-gradient(ellipse 60% 100% at 30% 0%, rgba(52,211,153,0.12), transparent 70%); }
.stage-band[data-stage="04"]::before { background: radial-gradient(ellipse 60% 100% at 30% 0%, rgba(245,158,11,0.13), transparent 70%); }
.stage-band[data-stage="05"]::before { background: radial-gradient(ellipse 60% 100% at 30% 0%, rgba(251,191,36,0.13), transparent 70%); }
.stage-band[data-stage="06"]::before { background: radial-gradient(ellipse 60% 100% at 30% 0%, rgba(251,146,60,0.13), transparent 70%); }
.stage-row {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 0.85fr 1.15fr;
  gap: 48px; align-items: center;
}
@media (max-width: 960px) { .stage-row { grid-template-columns: 1fr; gap: 24px; } }
.stage-lead { display: flex; flex-direction: column; }
.stage-num {
  font-family: var(--mono); font-size: 3.4rem; font-weight: 800;
  line-height: 1; letter-spacing: -0.04em; margin-bottom: 16px;
}
.stage-band[data-stage="01"] .stage-num { color: #38BDF8; }
.stage-band[data-stage="02"] .stage-num { color: #22D3EE; }
.stage-band[data-stage="03"] .stage-num { color: #34D399; }
.stage-band[data-stage="04"] .stage-num { color: #FBBF24; }
.stage-band[data-stage="05"] .stage-num { color: #FCD34D; }
.stage-band[data-stage="06"] .stage-num { color: #FB923C; }
.stage-eyebrow {
  display: inline-flex; align-self: flex-start; align-items: center; gap: 6px;
  font-family: var(--mono); font-size: 0.7rem; font-weight: 600;
  letter-spacing: 0.12em; text-transform: uppercase;
  padding: 5px 11px; border-radius: 9999px;
  background: rgba(255,255,255,0.05); color: var(--accent-bright);
  box-shadow: inset 0 0 0 1px rgba(245,158,11,0.3);
  margin-bottom: 14px;
}
.stage-name {
  font-size: 1.7rem; font-weight: 800; letter-spacing: -0.02em;
  line-height: 1.2; margin-bottom: 12px; color: var(--ink);
}
.stage-tagline { font-size: 1rem; color: var(--secondary); line-height: 1.65; max-width: 44ch; }
.stage-detail {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px; padding: 28px 30px;
  box-shadow: 0 24px 60px -30px rgba(0,0,0,0.7);
}
.stage-detail-label {
  font-size: 0.68rem; font-weight: 700; text-transform: uppercase;
  letter-spacing: 0.12em; color: var(--tertiary); margin-bottom: 14px;
}
.stage-detail p { font-size: 0.98rem; color: var(--ink-2); line-height: 1.7; }
.stage-detail p + p { margin-top: 12px; }
.stage-detail strong { color: var(--ink); font-weight: 700; }
.stage-detail .out {
  display: inline-flex; align-items: center; gap: 7px;
  margin-top: 16px; padding-top: 14px;
  border-top: 1px dashed var(--border-solid);
  font-size: 0.86rem; font-weight: 600; color: var(--good);
}

/* ================= BENTO (feature grid) ================= */
.bento-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px;
}
@media (max-width: 880px) { .bento-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .bento-grid { grid-template-columns: 1fr; } }
.bento-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 24px; padding: 30px;
  position: relative; overflow: hidden;
  transition: transform 0.6s var(--spring), box-shadow 0.6s var(--spring), border-color 0.6s;
}
.bento-card:hover {
  transform: translateY(-3px);
  border-color: rgba(245,158,11,0.3);
  box-shadow: 0 24px 50px -24px rgba(245,158,11,0.2);
}
.bento-icon {
  width: 42px; height: 42px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
  background: var(--accent-wash);
  color: var(--accent-bright);
  box-shadow: inset 0 0 0 1px rgba(245,158,11,0.2);
}
.bento-card h3 { font-size: 1.06rem; font-weight: 800; letter-spacing: -0.015em; margin-bottom: 8px; color: var(--ink); }
.bento-card p { font-size: 0.9rem; color: var(--secondary); line-height: 1.55; }
.bento-featured {
  background: linear-gradient(135deg, rgba(245,158,11,0.1) 0%, var(--surface) 60%, rgba(56,189,248,0.06) 100%);
  border-color: rgba(245,158,11,0.3);
}
.bento-featured .bento-icon { background: linear-gradient(135deg, var(--accent-bright), var(--accent-mid)); color: #0A0E17; }

/* ================= AUDIENCE (适合人群) ================= */
.audience-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
@media (max-width: 820px) { .audience-grid { grid-template-columns: 1fr; } }
.audience-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px; padding: 28px 26px;
  transition: transform 0.5s var(--spring), border-color 0.5s;
}
.audience-card:hover { transform: translateY(-2px); border-color: rgba(245,158,11,0.3); }
.audience-card .ac-icon {
  width: 38px; height: 38px; border-radius: 10px;
  background: var(--accent-wash); color: var(--accent-bright);
  display: flex; align-items: center; justify-content: center; margin-bottom: 16px;
  box-shadow: inset 0 0 0 1px rgba(245,158,11,0.2);
}
.audience-card h4 { font-size: 1.02rem; font-weight: 700; letter-spacing: -0.01em; margin-bottom: 7px; color: var(--ink); }
.audience-card p { font-size: 0.86rem; color: var(--secondary); line-height: 1.6; }

/* ================= WECHAT (CTA) ================= */
.wechat-section { background: var(--canvas); padding: 40px 0 80px; }
.wechat-card {
  background: linear-gradient(180deg, #232E45 0%, #1A2436 100%);
  border: 1px solid rgba(245,158,11,0.28);
  border-radius: 26px;
  padding: 44px 48px;
  display: grid; grid-template-columns: 1.3fr 1fr;
  gap: 48px; align-items: center;
  max-width: 960px; margin: 0 auto;
  position: relative; overflow: hidden;
  box-shadow: 0 40px 90px -36px rgba(0,0,0,0.8), 0 0 50px -16px rgba(245,158,11,0.18);
}
.wechat-card::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse 600px 300px at 70% 20%, rgba(245,158,11,0.18), transparent 60%);
  pointer-events: none;
}
.wechat-left { position: relative; z-index: 1; }
.wechat-eyebrow {
  display: inline-block;
  font-size: 0.7rem; font-weight: 700;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--accent-bright);
  background: rgba(245,158,11,0.12);
  padding: 5px 12px; border-radius: 9999px;
  border: 1px solid rgba(245,158,11,0.3);
  margin-bottom: 16px;
}
.wechat-title { font-size: 1.65rem; font-weight: 800; letter-spacing: -0.025em; color: #fff; line-height: 1.25; margin-bottom: 14px; }
.wechat-desc { font-size: 0.9rem; color: #AEB8C8; line-height: 1.65; margin-bottom: 16px; }
.wechat-strong { color: var(--accent-bright); font-weight: 700; }
.wechat-points { list-style: none; display: flex; flex-direction: column; gap: 7px; }
.wechat-points li { display: flex; align-items: center; gap: 10px; font-size: 0.85rem; color: #D4DAE6; }
.wechat-dot { width: 5px; height: 5px; border-radius: 50%; background: var(--accent-bright); flex-shrink: 0; box-shadow: 0 0 0 3px rgba(245,158,11,0.2); }
.wechat-right { display: flex; flex-direction: column; align-items: center; gap: 12px; position: relative; z-index: 1; }
.wechat-qr-wrap { background: #fff; border-radius: 14px; padding: 10px; box-shadow: 0 12px 32px -10px rgba(0,0,0,0.7), 0 0 24px -6px rgba(245,158,11,0.3); }
.wechat-qr-img { display: block; width: 200px; height: 200px; object-fit: cover; border-radius: 6px; }
.wechat-qr-caption { font-size: 0.8rem; font-weight: 600; color: var(--accent-bright); letter-spacing: 0.04em; }
@media (max-width: 720px) {
  .wechat-card { grid-template-columns: 1fr; gap: 28px; padding: 32px 24px; text-align: center; }
  .wechat-eyebrow, .wechat-points { display: inline-flex; }
  .wechat-points { flex-direction: column; align-items: center; }
  .wechat-title { font-size: 1.4rem; }
}

/* ================= FAQ ================= */
.faq-section { background: var(--canvas); }
.faq-wrap { max-width: 740px; margin: 0 auto; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px; margin-bottom: 12px;
  overflow: hidden; transition: border-color 0.4s;
}
.faq-item:hover { border-color: rgba(245,158,11,0.3); }
.faq-item[open] { border-color: rgba(245,158,11,0.4); box-shadow: 0 18px 44px -24px rgba(245,158,11,0.25); }
.faq-item summary {
  padding: 20px 26px; font-size: 1rem; font-weight: 600; color: var(--ink);
  cursor: pointer; display: flex; justify-content: space-between; align-items: center;
  gap: 16px; list-style: none; user-select: none; transition: background 0.4s;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { background: rgba(255,255,255,0.02); }
.faq-plus {
  flex-shrink: 0; width: 24px; height: 24px;
  display: flex; align-items: center; justify-content: center;
  transition: transform 0.4s var(--spring); color: var(--accent-bright);
}
.faq-item[open] .faq-plus { transform: rotate(135deg); }
.faq-body { padding: 0 26px 22px; font-size: 0.92rem; color: var(--secondary); line-height: 1.7; }
.faq-body p + p { margin-top: 10px; }
.faq-body strong { color: var(--ink); }

/* ================= FINAL CTA ================= */
.cta-section { background: linear-gradient(180deg, var(--canvas) 0%, #1B2538 100%); padding: 110px 0; position: relative; overflow: hidden; border-top: 1px solid rgba(245,158,11,0.12); }
.cta-section::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(circle at 30% 40%, rgba(245,158,11,0.16), transparent 55%),
    radial-gradient(circle at 78% 60%, rgba(56,189,248,0.1), transparent 50%);
}
.cta-section::after {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 800px 400px at 50% 50%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 800px 400px at 50% 50%, #000 30%, transparent 75%);
}
.cta-inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: center;
}
.cta-inner h2 {
  font-size: clamp(2.1rem, 4.2vw, 3rem); font-weight: 800;
  letter-spacing: -0.032em; line-height: 1.08; color: #FBFCFE; margin-bottom: 18px;
}
.cta-inner h2 .mark { color: var(--accent-bright); }
.cta-inner p { color: #AEB8C8; font-size: 1.06rem; margin-bottom: 30px; line-height: 1.65; max-width: 52ch; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.cta-side {
  background: rgba(255,255,255,0.035);
  border: 1px solid rgba(245,158,11,0.18);
  border-radius: 20px; padding: 28px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}
.cta-side-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 0; border-bottom: 1px dashed rgba(255,255,255,0.08);
}
.cta-side-row:last-child { border-bottom: none; padding-bottom: 0; }
.cta-side-label { font-size: 0.82rem; color: #8A93A6; }
.cta-side-value { font-size: 0.88rem; color: #E4EAF3; font-weight: 600; font-family: var(--mono); }
.cta-side-value.good { color: #34D399; }
.cta-side-value.warn { color: var(--accent-bright); }
.cta-side-footer {
  margin-top: 18px; padding-top: 18px;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 0.75rem; color: #6A7589; text-align: center;
}

/* ================= FOOTER ================= */
footer { background: #0F1521; color: #6A7589; padding: 40px 0 44px; font-size: 0.78rem; border-top: 1px solid rgba(255,255,255,0.05); }
footer .footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; }
footer a { color: #8A93A6; transition: color 0.3s; }
footer a:hover { color: var(--accent-bright); }
footer .footer-links { display: flex; gap: 22px; }

/* ================= RESPONSIVE ================= */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-right { max-width: 480px; }
  .cost-grid { grid-template-columns: 1fr; }
  .cost-card-big { grid-row: auto; }
  .cta-inner { grid-template-columns: 1fr; gap: 32px; }
}
@media (max-width: 720px) {
  .section { padding: 84px 0; }
  .container { padding: 0 20px; }
  .hero { padding: calc(var(--offer-bar-h) + 120px) 0 80px; }
  .nav-links a:not(.nav-cta) { display: none; }
  nav { padding: 7px 7px 7px 18px; gap: 10px; }
}
@media (max-width: 640px) {
  .offer-bar { font-size: 0.7rem; }
  .nav-brand { font-size: 0.84rem; gap: 6px; }
  .nav-brand-mark { width: 16px; height: 16px; }
  .nav-cta { padding: 7px 12px; font-size: 0.72rem; }
  nav { padding: 6px 6px 6px 14px; gap: 8px; top: calc(var(--offer-bar-h) + 12px); }
  .hero { padding: calc(var(--offer-bar-h) + 100px) 0 56px; }
  .hero-eyebrow { flex-wrap: wrap; gap: 6px 8px; font-size: 0.82rem; }
  .hero-eyebrow .sep { display: none; }
  .hero-sub { font-size: 1.16rem; line-height: 1.6; }
  .cta-row { flex-direction: column; align-items: stretch; gap: 10px; }
  .cta-row .btn-primary, .cta-row .btn-ghost { width: 100%; justify-content: center; }
  .hero-trust { flex-wrap: wrap; gap: 10px 14px; font-size: 0.74rem; }
  .hero-trust .sep { display: none; }
  .hero-right { max-width: 100%; }
  .offer-card { padding: 28px 22px; border-radius: 22px; }
  .offer-card-title { font-size: 1.08rem; }
  .cost-section { padding: 64px 0; }
  .cost-card { padding: 26px 22px; border-radius: 20px; }
  .cost-card h3 { font-size: 1.16rem; line-height: 1.3; }
  .cost-counter-num { font-size: 2.4rem; }
  .stages-intro { padding: 56px 0 4px; }
  .stage-band { padding: 44px 0; }
  .stage-num { font-size: 2.8rem; margin-bottom: 12px; }
  .stage-name { font-size: 1.34rem; }
  .stage-detail { padding: 22px 22px; }
  .bento-card { padding: 24px 22px; border-radius: 20px; }
  .wechat-section { padding: 24px 0 56px; }
  .wechat-card { padding: 28px 22px; border-radius: 22px; }
  .wechat-title { font-size: 1.32rem; line-height: 1.3; }
  .wechat-qr-img { width: 172px; height: 172px; }
  .faq-section { padding: 64px 0; }
  .faq-item summary { font-size: 0.9rem; padding: 16px 18px; gap: 12px; line-height: 1.4; }
  .faq-body { padding: 0 18px 16px; font-size: 0.86rem; line-height: 1.65; }
  .cta-section { padding: 64px 0; }
  .cta-inner h2 { font-size: clamp(1.6rem, 6.8vw, 2.3rem); line-height: 1.15; }
  .cta-inner p { font-size: 0.92rem; line-height: 1.6; }
  .cta-actions { flex-direction: column; gap: 10px; }
  .cta-actions .btn-accent, .cta-actions .btn-ghost { width: 100%; justify-content: center; }
  .cta-side { padding: 22px 20px; border-radius: 18px; }
  footer { padding: 28px 0 36px; }
  .footer-inner { flex-direction: column; gap: 10px; text-align: center; font-size: 0.8rem; }
}
@media (max-width: 400px) {
  .container { padding: 0 16px; }
  .stage-num { font-size: 2.4rem; }
  .cost-counter-num { font-size: 2.1rem; }
  .wechat-qr-img { width: 156px; height: 156px; }
}
@media (hover: none) and (pointer: coarse) {
  .btn-primary:hover, .btn-accent:hover, .btn-ghost:hover, .nav-cta:hover,
  .faq-item:hover, .cost-card:hover, .bento-card:hover, .audience-card:hover { transform: none; }
}