/* ==========================================================================
   跨境智营（TikTok版）官网样式
   零依赖：无框架、无外部字体，任何静态托管可直接部署
   ========================================================================== */

:root {
  --bg-dark: #0b0e17;
  --bg-dark-2: #10152a;
  --bg-light: #ffffff;
  --bg-tint: #f5f7fc;
  --ink: #131630;
  --ink-soft: #4a5069;
  --muted: #6f7690;
  --line: #e6e9f2;
  --line-dark: rgba(255, 255, 255, 0.09);
  --cyan: #25f4ee;
  --blue: #4f7cff;
  --pink: #fe2c55;
  --grad: linear-gradient(120deg, #25f4ee, #4f7cff 48%, #fe2c55);
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 12px 40px rgba(19, 22, 48, 0.1);
  --shadow-lg: 0 24px 80px rgba(19, 22, 48, 0.18);
  --nav-h: 68px;
  --font: "PingFang SC", "Microsoft YaHei", "Segoe UI", "Helvetica Neue", "Noto Sans SC", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 12px);
  scrollbar-color: #333c60 #0d1020;
}

::selection { background: var(--pink); color: #fff; }

::-webkit-scrollbar { width: 12px; }
::-webkit-scrollbar-track { background: #0d1020; }
::-webkit-scrollbar-thumb { background: #333c60; border-radius: 8px; border: 3px solid #0d1020; }
::-webkit-scrollbar-thumb:hover { background: #46538a; }

:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; border-radius: 6px; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 200;
  padding: 10px 18px;
  border-radius: 999px;
  background: #fff;
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  transform: translateY(-64px);
  opacity: 0;
  pointer-events: none;
}
.skip-link:focus-visible {
  transform: none;
  opacity: 1;
  pointer-events: auto;
}

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg-light);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.container { width: min(1160px, calc(100% - 48px)); margin: 0 auto; }
.container-narrow { width: min(860px, calc(100% - 48px)); }

h1, h2, h3 { line-height: 1.25; letter-spacing: 0.01em; }
h1, h2 { text-wrap: balance; }

a { text-decoration: none; color: inherit; }

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ------------------------------ 按钮 ------------------------------ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  font-weight: 600;
  white-space: nowrap;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease;
  cursor: pointer;
}
.btn:active { transform: translateY(1px); }
.btn-sm { padding: 9px 20px; font-size: 14px; }
.btn-lg { padding: 14px 32px; font-size: 16px; }

.btn-primary {
  position: relative;
  overflow: hidden;
  color: #fff;
  background: linear-gradient(120deg, #e0164a, #f04a30);
  box-shadow: 0 8px 24px rgba(224, 22, 74, 0.35);
}
.btn-primary::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: -70%;
  width: 42%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.45), transparent);
  transform: skewX(-20deg);
  transition: left 0.55s ease;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 32px rgba(224, 22, 74, 0.45); }
.btn-primary:hover::before { left: 130%; }

.btn-outline { color: var(--ink); border: 1.5px solid rgba(19, 22, 48, 0.25); background: transparent; }
.btn-outline:hover { border-color: var(--ink); }

.btn-outline-light { color: #fff; border: 1.5px solid rgba(255, 255, 255, 0.4); }
.btn-outline-light:hover { border-color: #fff; }

.btn-ghost { color: var(--ink); }
.btn-ghost:hover { color: var(--pink); }

/* ------------------------------ 导航 ------------------------------ */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: 100;
  transition: background 0.25s ease, box-shadow 0.25s ease;
}
.site-nav.scrolled {
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--line), 0 8px 30px rgba(19, 22, 48, 0.06);
}
.site-nav.on-dark:not(.scrolled):not(.menu-open) { color: #fff; }
.site-nav.on-dark:not(.scrolled):not(.menu-open) .btn-outline,
.site-nav.on-dark:not(.scrolled):not(.menu-open) .btn-ghost { color: #fff; }
.site-nav.on-dark:not(.scrolled):not(.menu-open) .btn-ghost:hover { color: var(--cyan); }

.nav-inner { height: 100%; display: flex; align-items: center; gap: 32px; }

.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; }
.brand-mark { width: 30px; height: 30px; display: inline-flex; }
.brand-mark svg { width: 100%; height: 100%; }
.brand-text i {
  font-style: normal;
  font-size: 11px;
  font-weight: 600;
  vertical-align: 3px;
  margin-left: 6px;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--grad);
  color: #fff;
  letter-spacing: 0.04em;
}

.nav-links { display: flex; gap: 26px; margin-left: auto; font-size: 14.5px; font-weight: 500; }
.nav-links a { position: relative; opacity: 0.85; transition: opacity 0.15s ease, color 0.15s ease; }
.nav-links a:hover { opacity: 1; color: var(--pink); }
.nav-links a.active { opacity: 1; color: var(--pink); }
.nav-links a.active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -8px;
  transform: translateX(-50%);
  width: 16px;
  height: 3px;
  border-radius: 999px;
  background: var(--grad);
}
.site-nav.on-dark:not(.scrolled):not(.menu-open) .nav-links a.active { color: var(--cyan); }

.nav-cta { display: flex; gap: 10px; }

/* 折叠菜单内的 CTA，桌面态隐藏 */
.nav-mcta { display: none; }

.nav-toggle { display: none; background: none; border: 0; width: 40px; height: 40px; flex-direction: column; justify-content: center; align-items: center; gap: 5px; cursor: pointer; }
.nav-toggle span { display: block; width: 20px; height: 2px; background: currentColor; border-radius: 2px; transition: transform 0.2s ease, opacity 0.2s ease; }

/* ------------------------------ HERO ------------------------------ */
.hero {
  position: relative;
  color: #fff;
  background: var(--bg-dark);
  padding: calc(var(--nav-h) + 72px) 0 110px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(720px 420px at 12% -8%, rgba(37, 244, 238, 0.16), transparent 62%),
    radial-gradient(820px 520px at 96% 12%, rgba(254, 44, 85, 0.17), transparent 60%),
    radial-gradient(640px 480px at 55% 118%, rgba(79, 124, 255, 0.16), transparent 65%);
}
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  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: 44px 44px;
  mask-image: radial-gradient(75% 65% at 50% 35%, #000 25%, transparent 100%);
  -webkit-mask-image: radial-gradient(75% 65% at 50% 35%, #000 25%, transparent 100%);
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.85);
  border: 1px solid var(--line-dark);
  background: rgba(255, 255, 255, 0.05);
  padding: 7px 16px;
  border-radius: 999px;
  margin-bottom: 26px;
}
.hero-badge .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); }

.hero h1 { font-size: clamp(34px, 4.6vw, 54px); font-weight: 800; margin-bottom: 22px; }

.hero-sub { font-size: 16.5px; color: rgba(255, 255, 255, 0.72); max-width: 560px; margin-bottom: 34px; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.hero-actions.center { justify-content: center; }

.hero-points { list-style: none; display: flex; flex-wrap: wrap; gap: 10px 24px; margin-top: 30px; }
.hero-points li { font-size: 13.5px; color: rgba(255, 255, 255, 0.62); padding-left: 20px; position: relative; }
.hero-points li::before { content: "✓"; content: "✓" / ""; position: absolute; left: 0; color: var(--cyan); font-weight: 700; }

/* HERO 模拟界面 */
.hero-visual { position: relative; }

.mock-window {
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.5);
  overflow: hidden;
}
.mock-titlebar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-dark);
}
.mock-titlebar span { width: 11px; height: 11px; border-radius: 50%; background: rgba(255, 255, 255, 0.14); }
.mock-titlebar span:first-child { background: #ff5f57; }
.mock-titlebar span:nth-child(2) { background: #febc2e; }
.mock-titlebar span:nth-child(3) { background: #28c840; }
.mock-titlebar b { margin-left: 10px; font-size: 12px; font-weight: 500; color: rgba(255, 255, 255, 0.55); }

.mock-body { display: flex; }

.mock-side { width: 52px; border-right: 1px solid var(--line-dark); padding: 16px 0; display: flex; flex-direction: column; align-items: center; gap: 14px; }
.mock-side i { width: 24px; height: 24px; border-radius: 8px; background: rgba(255, 255, 255, 0.08); }
.mock-side i.on { background: var(--grad); }

.mock-main { flex: 1; padding: 16px; display: flex; flex-direction: column; gap: 14px; }

.mock-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.mock-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-sm);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.mock-card b { font-size: 11px; font-weight: 500; color: rgba(255, 255, 255, 0.55); }
.mock-card strong { font-size: 22px; font-weight: 700; }
.mock-card u { text-decoration: none; font-size: 10.5px; color: rgba(255, 255, 255, 0.45); }
.mock-card u.up { color: #35d07f; }
.mock-card u.down { color: #ff7b54; }

.mock-chat { background: rgba(255, 255, 255, 0.04); border: 1px solid var(--line-dark); border-radius: var(--radius-sm); padding: 12px; display: flex; flex-direction: column; gap: 9px; }
.bubble { max-width: 88%; font-size: 12px; line-height: 1.55; padding: 9px 12px; border-radius: 12px; }
.bubble.user { align-self: flex-end; background: linear-gradient(120deg, rgba(254, 44, 85, 0.85), rgba(255, 93, 67, 0.85)); border-bottom-right-radius: 4px; }
.bubble.agent { align-self: flex-start; background: rgba(255, 255, 255, 0.08); border-bottom-left-radius: 4px; color: rgba(255, 255, 255, 0.85); }
.bubble.agent b { display: block; font-size: 10.5px; margin-bottom: 3px; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }

.mock-progress { display: flex; flex-direction: column; gap: 5px; margin-top: 2px; }
.mock-progress i { display: block; height: 6px; border-radius: 999px; background: rgba(255, 255, 255, 0.1); position: relative; overflow: hidden; }
.mock-progress i::after {
  content: "";
  position: absolute;
  inset: 0;
  width: var(--w, 60%);
  border-radius: inherit;
  background: var(--grad);
  background-size: 200% 100%;
  animation: shimmer 2.8s linear infinite;
}
@keyframes shimmer { to { background-position: -200% 0; } }
.mock-progress em { font-style: normal; font-size: 10.5px; color: rgba(255, 255, 255, 0.45); }

.mock-bars { display: flex; align-items: flex-end; gap: 8px; height: 64px; padding: 0 4px; }
.mock-bars i {
  flex: 1;
  height: var(--h, 40%);
  border-radius: 6px 6px 2px 2px;
  background: linear-gradient(180deg, rgba(37, 244, 238, 0.85), rgba(79, 124, 255, 0.45));
  transform-origin: bottom;
  animation: bar-up 0.9s cubic-bezier(0.22, 1, 0.36, 1) backwards;
}
.mock-bars i:nth-child(even) { background: linear-gradient(180deg, rgba(254, 44, 85, 0.75), rgba(254, 44, 85, 0.25)); }
.mock-bars i:nth-child(1) { animation-delay: 0.25s; }
.mock-bars i:nth-child(2) { animation-delay: 0.35s; }
.mock-bars i:nth-child(3) { animation-delay: 0.45s; }
.mock-bars i:nth-child(4) { animation-delay: 0.55s; }
.mock-bars i:nth-child(5) { animation-delay: 0.65s; }
.mock-bars i:nth-child(6) { animation-delay: 0.75s; }
.mock-bars i:nth-child(7) { animation-delay: 0.85s; }
@keyframes bar-up { from { transform: scaleY(0); } }

.float-chip {
  position: absolute;
  font-size: 12.5px;
  font-weight: 500;
  color: #fff;
  background: rgba(23, 28, 52, 0.92);
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  padding: 9px 16px;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.45);
  animation: floaty 5s ease-in-out infinite;
}
.chip-1 { top: -18px; right: -6px; }
.chip-2 { bottom: -16px; left: -10px; animation-delay: 2.5s; }

@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ------------------------------ 价值条 ------------------------------ */
.value { background: var(--bg-dark); padding: 0 0 84px; color: #fff; }
.value-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.value-item {
  border: 1px solid var(--line-dark);
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius);
  padding: 24px 22px;
}
.value-item h3 { font-size: 18px; margin-bottom: 8px; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; display: inline-block; }
.value-item p { font-size: 13.5px; color: rgba(255, 255, 255, 0.62); }

/* ------------------------------ 通用 Section ------------------------------ */
.section { padding: 104px 0; }
.section-tint { background: var(--bg-tint); }
.section-dark { background: var(--bg-dark); color: #fff; }

.section-head { text-align: center; max-width: 760px; margin: 0 auto 58px; }
.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: #d9184a;
  margin-bottom: 14px;
}
.section-dark .eyebrow { color: var(--cyan); }
.section-head h2 { font-size: clamp(26px, 3.4vw, 38px); font-weight: 800; margin-bottom: 16px; }
.section-sub { color: var(--ink-soft); font-size: 16px; }
.section-dark .section-sub { color: rgba(255, 255, 255, 0.62); }

/* ------------------------------ 双核心 ------------------------------ */
.dual-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.dual-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 36px 32px;
  background: #fff;
  box-shadow: var(--shadow);
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}
.dual-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.dual-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: #fff;
  background: linear-gradient(120deg, #4f7cff, #25f4ee);
  border-radius: 999px;
  padding: 4px 14px;
  margin-bottom: 18px;
}
.dual-tag.alt { background: linear-gradient(120deg, #fe2c55, #ff8a5c); }
.dual-card h3 { font-size: 22px; margin-bottom: 12px; }
.dual-card > p { color: var(--ink-soft); font-size: 14.5px; margin-bottom: 18px; }

.check-list { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.check-list li { position: relative; padding-left: 26px; font-size: 14px; color: var(--ink-soft); }
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  width: 16px;
  height: 16px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cdefs%3E%3ClinearGradient id='g' x1='0' y1='0' x2='16' y2='16' gradientUnits='userSpaceOnUse'%3E%3Cstop stop-color='%2325f4ee'/%3E%3Cstop offset='.55' stop-color='%234f7cff'/%3E%3Cstop offset='1' stop-color='%23fe2c55'/%3E%3C/linearGradient%3E%3C/defs%3E%3Ccircle cx='8' cy='8' r='8' fill='url(%23g)'/%3E%3Cpath d='M4.6 8.4l2.3 2.3 4.5-4.8' fill='none' stroke='%23fff' stroke-width='1.9' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") no-repeat center / contain;
}

/* ------------------------------ 模块矩阵 ------------------------------ */
.module-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.module-card {
  border: 1px solid var(--line-dark);
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius);
  padding: 26px 22px;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}
.module-card:hover { transform: translateY(-4px); background: rgba(255, 255, 255, 0.07); border-color: rgba(37, 244, 238, 0.35); }
.m-icon { display: inline-flex; width: 44px; height: 44px; border-radius: 13px; background: rgba(255, 255, 255, 0.07); border: 1px solid var(--line-dark); align-items: center; justify-content: center; margin-bottom: 16px; }
.m-icon svg { width: 23px; height: 23px; fill: none; stroke: var(--cyan); stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
.module-card:nth-child(even) .m-icon svg { stroke: #ff6b8d; }
.module-card h3 { font-size: 16.5px; margin-bottom: 8px; }
.module-card p { font-size: 13px; color: rgba(255, 255, 255, 0.58); line-height: 1.65; }

/* ------------------------------ Agent 卡片 ------------------------------ */
.agent-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.agent-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
  padding: 32px 30px;
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}
.agent-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.agent-card header { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.a-num {
  font-size: 13px;
  font-weight: 800;
  color: #fff;
  background: var(--grad);
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0.03em;
}
.agent-card h3 { font-size: 20px; }
.agent-card > p { font-size: 14px; color: var(--ink-soft); margin-bottom: 16px; }
.agent-card ul { list-style: none; display: flex; flex-direction: column; gap: 9px; }
.agent-card ul li { position: relative; padding-left: 18px; font-size: 13.5px; color: var(--ink-soft); }
.agent-card ul li::before { content: "›"; content: "›" / ""; position: absolute; left: 2px; top: -1px; font-weight: 800; color: var(--pink); }

.agent-strip {
  margin-top: 28px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(120deg, rgba(37, 244, 238, 0.07), rgba(79, 124, 255, 0.07), rgba(254, 44, 85, 0.07));
  padding: 24px 30px;
  text-align: center;
}
.agent-strip p { font-size: 14.5px; color: var(--ink-soft); }
.agent-strip b { color: var(--ink); }

/* ------------------------------ 财务 ------------------------------ */
.fin-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 22px; }
.fin-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 32px 30px;
}
.fin-card h3 { font-size: 20px; margin-bottom: 20px; }

.profit-steps { display: flex; align-items: stretch; gap: 10px; margin-bottom: 18px; }
.p-step {
  flex: 1;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--bg-tint);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.p-step b { font-size: 14.5px; }
.p-step span { font-size: 12px; color: var(--ink-soft); line-height: 1.55; }
.p-arrow { align-self: center; font-weight: 800; color: var(--pink); }

.fin-note { font-size: 13px; color: var(--muted); border-left: 3px solid; border-image: var(--grad) 1; padding-left: 14px; }

/* ------------------------------ 安全 ------------------------------ */
.sec-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.sec-card {
  border: 1px solid var(--line-dark);
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color 0.2s ease, background 0.2s ease;
}
.sec-card:hover { border-color: rgba(254, 44, 85, 0.4); background: rgba(255, 255, 255, 0.06); }
.sec-card h3 { font-size: 17px; margin-bottom: 10px; display: flex; align-items: center; gap: 10px; }
.sec-card h3::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--grad); box-shadow: 0 0 12px rgba(37, 244, 238, 0.7); }
.sec-card p { font-size: 13.5px; color: rgba(255, 255, 255, 0.6); }

/* ------------------------------ 定价 ------------------------------ */
.price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-bottom: 40px; }
.price-card {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
  padding: 34px 28px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}
.price-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.price-card.featured {
  border: 1.5px solid transparent;
  background:
    linear-gradient(#fff, #fff) padding-box,
    var(--grad) border-box;
}
.price-flag {
  position: absolute;
  top: -13px;
  left: 26px;
  font-size: 12px;
  font-weight: 700;
  color: #fff;
  background: var(--grad);
  border-radius: 999px;
  padding: 4px 14px;
}
.price-card h3 { font-size: 20px; }
.price-desc { font-size: 13.5px; color: var(--muted); min-height: 42px; }

.price-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  flex-wrap: wrap;
  border-radius: var(--radius);
  padding: 36px 40px;
  color: #fff;
  background:
    radial-gradient(480px 260px at 90% -30%, rgba(37, 244, 238, 0.25), transparent 65%),
    radial-gradient(460px 260px at 5% 130%, rgba(254, 44, 85, 0.3), transparent 65%),
    var(--bg-dark-2);
}
.price-cta h3 { font-size: 24px; margin-bottom: 6px; }
.price-cta p { font-size: 14px; color: rgba(255, 255, 255, 0.65); }
.price-cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ------------------------------ FAQ ------------------------------ */
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-list details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 0 22px;
  overflow: hidden;
  transition: box-shadow 0.2s ease;
}
.faq-list details[open] { box-shadow: var(--shadow); }
.faq-list summary {
  list-style: none;
  cursor: pointer;
  font-weight: 600;
  font-size: 15.5px;
  padding: 18px 30px 18px 0;
  position: relative;
  user-select: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary:hover { color: var(--pink); }
.faq-list details[open] p { animation: faq-in 0.32s ease; }
@keyframes faq-in { from { opacity: 0; transform: translateY(-4px); } }
.faq-list summary::after {
  content: "+";
  content: "+" / "";
  position: absolute;
  right: 2px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  font-weight: 400;
  color: var(--pink);
  transition: transform 0.2s ease;
}
.faq-list details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-list details p { font-size: 14px; color: var(--ink-soft); padding: 0 0 20px; }

/* ------------------------------ 结尾 CTA ------------------------------ */
.final-cta {
  background:
    radial-gradient(700px 380px at 50% -20%, rgba(79, 124, 255, 0.28), transparent 65%),
    var(--bg-dark);
  color: #fff;
  text-align: center;
  padding: 110px 0;
}
.final-cta h2 { font-size: clamp(28px, 3.8vw, 42px); font-weight: 800; margin-bottom: 14px; }
.final-cta p { color: rgba(255, 255, 255, 0.65); font-size: 16px; margin-bottom: 34px; }

/* ------------------------------ 页脚 ------------------------------ */
.site-footer { background: #080b13; color: rgba(255, 255, 255, 0.62); }
.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  padding: 64px 0 40px;
}
.footer-brand p { margin-top: 16px; font-size: 13.5px; line-height: 1.8; }
.footer-brand .brand { color: #fff; }
.footer-col h4 { color: #fff; font-size: 14.5px; margin-bottom: 16px; }
.footer-col a { display: block; font-size: 13.5px; margin-bottom: 10px; opacity: 0.72; transition: opacity 0.15s ease, color 0.15s ease; }
.footer-col a:hover { opacity: 1; color: var(--cyan); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 22px 0 28px;
  font-size: 12.5px;
  color: rgba(255, 255, 255, 0.68);
}

/* ------------------------------ 返回顶部 ------------------------------ */
.to-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  z-index: 90;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: var(--ink);
  box-shadow: var(--shadow);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease, color 0.2s ease, border-color 0.2s ease;
}
.to-top.show { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { color: var(--pink); border-color: rgba(254, 44, 85, 0.5); }
.to-top svg { width: 19px; height: 19px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }

/* ------------------------------ 入场动画（仅 JS 可用时隐藏，保证无 JS 也能看到内容） ------------------------------ */
.js .reveal { opacity: 0; transform: translateY(26px); transition: opacity 0.7s ease, transform 0.7s ease; }
.js .reveal.in { opacity: 1; transform: none; }

/* 网格内卡片错峰入场 */
.js .value-grid .reveal:nth-child(2),
.js .module-grid .reveal:nth-child(4n + 2),
.js .sec-grid .reveal:nth-child(3n + 2),
.js .agent-grid .reveal:nth-child(even),
.js .price-grid .reveal:nth-child(2) { transition-delay: 0.08s; }
.js .value-grid .reveal:nth-child(3),
.js .module-grid .reveal:nth-child(4n + 3),
.js .sec-grid .reveal:nth-child(3n),
.js .price-grid .reveal:nth-child(3) { transition-delay: 0.16s; }
.js .value-grid .reveal:nth-child(4),
.js .module-grid .reveal:nth-child(4n) { transition-delay: 0.24s; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
  .float-chip,
  .mock-bars i,
  .mock-progress i::after,
  .btn-primary::before { animation: none !important; }
  .faq-list details[open] p { animation: none; }
}

/* ------------------------------ 响应式 ------------------------------ */
/* 导航折叠：内容实际需要约 1035px 宽，1100px 以下收进汉堡菜单 */
@media (max-width: 1100px) {
  .nav-links,
  .nav-cta { display: none; }
  .nav-toggle { display: flex; }

  .site-nav.menu-open { background: var(--bg-light); color: var(--ink); box-shadow: 0 1px 0 var(--line); }
  .site-nav.menu-open .nav-links {
    display: flex;
    position: fixed;
    top: var(--nav-h);
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg-light);
    border-bottom: 1px solid var(--line);
    padding: 8px 24px 20px;
    box-shadow: 0 30px 60px rgba(19, 22, 48, 0.14);
  }
  .site-nav.menu-open .nav-links a { padding: 13px 0; border-bottom: 1px solid var(--line); font-size: 15px; }
  .site-nav.menu-open .nav-links a:last-child { border-bottom: 0; }
  .site-nav.menu-open .nav-links a.active::after { display: none; }
  .site-nav.menu-open .nav-links .nav-mcta {
    display: flex;
    justify-content: center;
    align-items: center;
    border-bottom: 0;
    border-radius: 999px;
    padding: 12px 0;
    font-weight: 600;
  }
  .site-nav.menu-open .nav-links .nav-mcta-ghost { margin-top: 14px; border: 1.5px solid rgba(19, 22, 48, 0.3); }
  .site-nav.menu-open .nav-links .nav-mcta-solid { margin-top: 10px; background: linear-gradient(120deg, #e0164a, #f04a30); color: #fff; }
  .site-nav.menu-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .site-nav.menu-open .nav-toggle span:nth-child(2) { opacity: 0; }
  .site-nav.menu-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 64px; }
  .hero-sub { max-width: none; }
  .hero-visual { max-width: 640px; margin: 0 auto; width: 100%; }
  .module-grid { grid-template-columns: repeat(3, 1fr); }
  .value-grid { grid-template-columns: repeat(2, 1fr); }
  .fin-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 820px) {
  .section { padding: 72px 0; }
  .dual-grid, .agent-grid { grid-template-columns: 1fr; }
  .module-grid { grid-template-columns: repeat(2, 1fr); }
  .sec-grid { grid-template-columns: 1fr 1fr; }
  .price-grid { grid-template-columns: 1fr; }
  .profit-steps { flex-direction: column; }
  .p-arrow { transform: rotate(90deg); }
  .price-cta { justify-content: center; text-align: center; }
}

@media (max-width: 560px) {
  .container { width: calc(100% - 36px); }
  .value-grid, .module-grid, .sec-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .hero { padding-bottom: 80px; }
  .hero-actions .btn { width: 100%; }
  .float-chip { display: none; }
}