/* ============================================================
   微风岛屿 · 宣传网站样式
   设计语言：Apple 产品页式深浅交替 + 高饱和海岛渐变强调色
   ============================================================ */

/* ---------- Tokens & Reset ---------- */
:root {
  --black: #000000;
  --ink: #1d1d1f;
  --ink-2: #424245;
  --gray: #86868b;
  --gray-2: #6e6e73;
  --paper: #f5f5f7;
  --white: #ffffff;
  --card-dark: #1c1c1e;
  --hairline-dark: rgba(255, 255, 255, 0.10);
  --hairline-light: rgba(0, 0, 0, 0.10);

  --teal: #00e5b0;
  --blue: #00a3ff;
  --danger: #ff5a5f;
  --grad: linear-gradient(120deg, #00e5b0 0%, #00a3ff 100%);

  --radius-card: 28px;
  --radius-panel: 22px;
  --nav-h: 52px;
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", "Segoe UI", "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);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--black);
  color: var(--paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg { display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; }

::selection { background: rgba(0, 229, 176, 0.35); }

/* ---------- Utilities ---------- */
.container {
  width: min(1120px, 100% - 48px);
  margin-inline: auto;
}
.container-narrow { width: min(820px, 100% - 48px); }

.section { padding: clamp(88px, 12vw, 150px) 0; }
.section.light { background: var(--paper); color: var(--ink); }
.section.dark  { background: var(--black); color: var(--paper); }

.eyebrow {
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  margin-bottom: 14px;
}

.h2 {
  font-size: clamp(34px, 5vw, 58px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.02em;
}

.lead {
  margin-top: 20px;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.65;
  color: var(--gray);
  max-width: 720px;
}
.section.light .lead { color: var(--gray-2); }

.section-note {
  margin-top: 56px;
  text-align: center;
  font-size: 17px;
  color: var(--gray-2);
}
.section.dark .section-note { color: var(--gray); }
.accent-note {
  font-size: clamp(20px, 2.6vw, 26px) !important;
  font-weight: 700;
  color: var(--paper) !important;
}
.accent-note::after {
  content: "";
  display: block;
  width: 72px; height: 3px;
  margin: 18px auto 0;
  border-radius: 2px;
  background: var(--grad);
}

.footnote-tag {
  font-size: 0.7em;
  vertical-align: super;
  opacity: 0.75;
  margin-left: 2px;
}

.br-m { display: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 980px;
  font-size: 16px;
  font-weight: 600;
  padding: 13px 28px;
  transition: transform 0.25s ease, filter 0.25s ease, background 0.25s ease, border-color 0.25s ease;
  cursor: pointer;
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }
.btn-primary {
  background: var(--grad);
  color: #041312;
  box-shadow: 0 8px 30px rgba(0, 229, 176, 0.28);
}
.btn-primary:hover { filter: brightness(1.1); transform: translateY(-1px); }
.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.38);
  color: var(--paper);
  background: transparent;
}
.btn-ghost:hover { border-color: var(--teal); color: var(--teal); }
.btn-sm { padding: 7px 18px; font-size: 14px; }
.btn-lg { padding: 16px 40px; font-size: 18px; }

/* ---------- Cards ---------- */
.card {
  border-radius: var(--radius-card);
  padding: 36px 32px;
  transition: transform 0.35s ease, box-shadow 0.35s ease;
}
.card:hover { transform: translateY(-5px); }
.light-card {
  background: var(--white);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
}
.light-card:hover { box-shadow: 0 14px 34px rgba(0, 0, 0, 0.10); }
.dark-card {
  background: var(--card-dark);
  border: 1px solid var(--hairline-dark);
}
.dark-card:hover { box-shadow: 0 16px 40px rgba(0, 0, 0, 0.55); }

.card h3 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 10px;
}
.card p { font-size: 15.5px; line-height: 1.7; }
.light-card p { color: var(--gray-2); }
.dark-card p { color: var(--gray); }

.card-icon {
  width: 46px; height: 46px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  margin-bottom: 20px;
}
.card-icon svg { width: 26px; height: 26px; }
.light-card .card-icon { background: rgba(0, 163, 255, 0.10); color: #0084d1; }
.dark-card .card-icon { background: rgba(0, 229, 176, 0.10); color: var(--teal); }

/* ============================================================
   导航
   ============================================================ */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  background: rgba(0, 0, 0, 0.72);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.nav-inner {
  width: min(1120px, 100% - 40px);
  margin-inline: auto;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--white);
}
.brand-mark { width: 24px; height: 24px; }

.nav-links {
  display: flex;
  gap: 26px;
  margin-inline: auto;
}
.nav-links a {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.78);
  transition: color 0.2s ease;
  padding: 6px 0;
}
.nav-links a:hover { color: var(--teal); }

.nav-actions { display: flex; align-items: center; gap: 14px; }

.nav-burger {
  display: none;
  width: 36px; height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  position: relative;
}
.nav-burger span {
  position: absolute;
  left: 7px; right: 7px;
  height: 1.8px;
  background: var(--white);
  border-radius: 2px;
  transition: transform 0.3s ease, top 0.3s ease;
}
.nav-burger span:nth-child(1) { top: 13px; }
.nav-burger span:nth-child(2) { top: 21px; }
body.nav-open .nav-burger span:nth-child(1) { top: 17px; transform: rotate(45deg); }
body.nav-open .nav-burger span:nth-child(2) { top: 17px; transform: rotate(-45deg); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  /* 高度与视口单位解耦（clamp 基于 vw），避免打印/整页截图工具产生视口反馈循环 */
  min-height: clamp(680px, 58vw, 1020px);
  background:
    radial-gradient(900px 480px at 50% 108%, rgba(0, 229, 176, 0.16), transparent 65%),
    var(--black);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  text-align: center;
  padding-top: calc(var(--nav-h) + clamp(56px, 9vh, 110px));
  overflow: hidden;
}
.hero-inner { width: min(1120px, 100% - 40px); }

.hero-eyebrow {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--teal);
  margin-bottom: 18px;
}
.hero-title {
  font-size: clamp(38px, 9.5vw, 92px);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.08;
  background: linear-gradient(180deg, #ffffff 30%, #b9f5e6 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.hero-sub {
  margin-top: 22px;
  font-size: clamp(17px, 2.2vw, 23px);
  color: var(--gray);
  font-weight: 500;
}
.hero-cta {
  margin-top: 34px;
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* 悬浮论文样机 + 海岛场景 */
.hero-visual {
  position: relative;
  margin-top: clamp(48px, 7vh, 84px);
}
.island-scene {
  width: 100%;
  height: auto;
}
.doc-card {
  position: absolute;
  left: 50%;
  top: 4%;
  transform: translateX(-50%);
  width: min(430px, 78vw);
  background: rgba(18, 24, 23, 0.88);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(0, 229, 176, 0.30);
  border-radius: 18px;
  box-shadow:
    0 30px 80px rgba(0, 0, 0, 0.65),
    0 0 60px rgba(0, 229, 176, 0.12);
  padding: 16px 20px 18px;
  animation: floaty 6s ease-in-out infinite;
  z-index: 2;
}
@keyframes floaty {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-12px); }
}
.doc-head { display: flex; align-items: center; gap: 6px; }
.doc-dot { width: 8px; height: 8px; border-radius: 50%; background: rgba(255,255,255,0.18); }
.doc-title {
  margin-left: auto;
  margin-right: auto;
  font-size: 12px;
  color: var(--gray);
  letter-spacing: 0.06em;
}
.doc-body {
  margin: 14px 0 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.doc-line {
  height: 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.10);
}
.doc-line.title-line { height: 12px; background: linear-gradient(90deg, rgba(0,229,176,0.65), rgba(0,163,255,0.65)); }
.w-40 { width: 40%; } .w-60 { width: 60%; } .w-70 { width: 70%; }
.w-85 { width: 85%; } .w-90 { width: 90%; } .w-95 { width: 95%; }
.doc-badges { display: flex; gap: 8px; flex-wrap: wrap; }
.badge {
  font-size: 11.5px;
  color: var(--teal);
  border: 1px solid rgba(0, 229, 176, 0.4);
  background: rgba(0, 229, 176, 0.08);
  border-radius: 999px;
  padding: 4px 10px;
  white-space: nowrap;
}

/* 微风线动画 */
.breeze path {
  stroke-dasharray: 8 16;
  animation: breeze 5s linear infinite;
}
.breeze .b2 { animation-duration: 6.5s; animation-delay: 0.4s; }
.breeze .b3 { animation-duration: 8s; animation-delay: 0.9s; }
@keyframes breeze {
  to { stroke-dashoffset: -240; }
}
.palm { transform-origin: 600px 262px; animation: sway 7s ease-in-out infinite; }
@keyframes sway {
  0%, 100% { transform: rotate(0deg); }
  50% { transform: rotate(1.6deg); }
}

/* ============================================================
   第一章 · 为什么用 AI
   ============================================================ */
.stats {
  margin-top: 72px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.stat {
  text-align: center;
  padding: 40px 20px;
  background: var(--white);
  border-radius: var(--radius-card);
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
}
.stat-num {
  font-size: clamp(44px, 5.4vw, 64px);
  font-weight: 800;
  letter-spacing: -0.02em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  line-height: 1.1;
}
.stat-label {
  margin-top: 12px;
  font-size: 14.5px;
  color: var(--gray-2);
  line-height: 1.55;
}

.benefit-grid {
  margin-top: 26px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

/* ============================================================
   第二章 · 常见的坑
   ============================================================ */
.pain-grid {
  margin-top: 64px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.pain-card { padding: 40px 36px; }
.pain-index {
  font-size: 15px;
  font-weight: 700;
  color: var(--danger);
  letter-spacing: 0.14em;
  margin-bottom: 16px;
}
.pain-card h3 { font-size: 26px; color: var(--white); }
.pain-demo {
  margin-top: 22px;
  padding: 16px 18px;
  border-radius: 14px;
  background: rgba(255, 90, 95, 0.07);
  border: 1px dashed rgba(255, 90, 95, 0.35);
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-start;
}
.demo-tag {
  font-size: 13.5px;
  color: rgba(255, 255, 255, 0.65);
  text-decoration: line-through;
  text-decoration-color: rgba(255, 90, 95, 0.8);
  text-decoration-thickness: 1.5px;
}
.demo-verdict { font-size: 14px; font-weight: 700; color: var(--danger); }

/* ============================================================
   第三章 · 该上岛了
   ============================================================ */
.island-section {
  background:
    radial-gradient(1100px 560px at 14% 6%, rgba(0, 163, 255, 0.10), transparent 60%),
    radial-gradient(1000px 520px at 86% 34%, rgba(0, 229, 176, 0.09), transparent 60%),
    var(--black);
}
.island-section > .container:first-child { text-align: center; }
.island-section .lead { margin-inline: auto; }

.showcase { padding: clamp(80px, 10vw, 130px) 0 0; }
.showcase-text { text-align: center; }
.feature-kicker {
  display: inline-block;
  font-size: 13.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--teal);
  padding: 7px 18px;
  border-radius: 999px;
  border: 1px solid rgba(0, 229, 176, 0.35);
  background: rgba(0, 229, 176, 0.07);
  margin-bottom: 16px;
}
.feature-title {
  font-size: clamp(30px, 4.6vw, 52px);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--white);
}
.feature-desc {
  margin-top: 18px;
  font-size: clamp(16px, 1.9vw, 19px);
  color: var(--gray);
  max-width: 700px;
  margin-inline: auto;
}
.showcase-visual {
  width: min(760px, 100% - 40px);
  margin: 48px auto 0;
}

/* 文献面板 */
.ref-panel, .hallu-panel, .check-panel {
  background: rgba(20, 20, 22, 0.9);
  border: 1px solid var(--hairline-dark);
  border-radius: var(--radius-panel);
  padding: 26px 28px;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.55);
}
.ref-panel {
  border-color: rgba(0, 229, 176, 0.28);
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.55), 0 0 50px rgba(0, 229, 176, 0.07);
}
.ref-head, .check-head {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--gray);
  margin-bottom: 16px;
}
.ref-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 4px;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
}
.ref-item p { font-size: 14.5px; line-height: 1.5; color: rgba(255, 255, 255, 0.88); flex: 1; }
.ref-item em { font-style: normal; font-size: 12.5px; color: var(--gray); }
.ref-tag {
  font-size: 11px;
  font-weight: 700;
  padding: 4px 9px;
  border-radius: 7px;
  white-space: nowrap;
  background: rgba(0, 163, 255, 0.14);
  color: #6cc8ff;
  border: 1px solid rgba(0, 163, 255, 0.35);
}
.ref-ok { color: var(--teal); font-size: 13px; font-weight: 700; white-space: nowrap; }

/* 幻觉面板 */
.hallu-row {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 16px 18px;
  border-radius: 14px;
}
.hallu-row.bad {
  background: rgba(255, 90, 95, 0.08);
  border: 1px solid rgba(255, 90, 95, 0.30);
}
.hallu-row.good {
  background: rgba(0, 229, 176, 0.07);
  border: 1px solid rgba(0, 229, 176, 0.30);
}
.hallu-row p { font-size: 14.5px; line-height: 1.55; }
.hallu-row.bad p { color: rgba(255, 255, 255, 0.72); text-decoration: line-through rgba(255, 90, 95, 0.6); }
.hallu-row.good p { color: rgba(255, 255, 255, 0.92); }
.hallu-row em { display: block; font-style: normal; font-size: 12.5px; margin-top: 4px; }
.hallu-row.bad em { color: var(--danger); }
.hallu-row.good em { color: var(--teal); }
.hallu-mark {
  flex: none;
  width: 24px; height: 24px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 13px;
  font-weight: 800;
}
.hallu-row.bad .hallu-mark { background: rgba(255, 90, 95, 0.18); color: var(--danger); }
.hallu-row.good .hallu-mark { background: rgba(0, 229, 176, 0.16); color: var(--teal); }
.hallu-arrow {
  text-align: center;
  font-size: 14px;
  font-weight: 700;
  padding: 10px 0;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* 验货面板 */
.check-panel { border-color: rgba(0, 229, 176, 0.28); }
.check-panel ul li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 15px;
  color: rgba(255, 255, 255, 0.88);
  padding: 12px 2px;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
}
.check-panel ul li span {
  flex: none;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: rgba(0, 229, 176, 0.16);
  color: var(--teal);
  font-size: 12px;
  font-weight: 800;
  display: grid;
  place-items: center;
}
.check-cta {
  margin-top: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}
.check-amount { font-size: 15px; font-weight: 700; color: var(--white); }
.check-btn {
  font-size: 14px;
  font-weight: 700;
  color: #041312;
  background: var(--grad);
  border-radius: 999px;
  padding: 9px 20px;
}

/* 全流程板块（一次服务，永不操心） */
.flow-head { text-align: center; padding-top: clamp(80px, 10vw, 130px); }
.flow-band {
  margin-top: 44px;
  background:
    linear-gradient(90deg,
      rgba(0, 229, 176, 0.16) 0%,
      rgba(0, 163, 255, 0.22) 60%,
      rgba(0, 163, 255, 0.34) 100%);
  clip-path: polygon(
    0 0,
    calc(100% - 64px) 0,
    100% 50%,
    calc(100% - 64px) 100%,
    0 100%
  );
  padding: 24px 96px 24px 44px;
}
.flow-band-items {
  display: flex;
  align-items: stretch;
  list-style: none;
  counter-reset: flow;
}
.flow-item {
  flex: 1 1 0;
  min-width: 0;
  text-align: center;
  padding: 4px 12px;
  counter-increment: flow;
}
.flow-item::before {
  content: "0" counter(flow);
  display: block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--teal);
  opacity: 0.75;
  margin-bottom: 12px;
}
.flow-item + .flow-item { border-left: 1px solid rgba(255, 255, 255, 0.10); }
.flow-item-icon {
  width: 46px; height: 46px;
  margin: 0 auto 12px;
  border-radius: 13px;
  display: grid;
  place-items: center;
  background: rgba(0, 229, 176, 0.12);
  color: var(--teal);
}
.flow-item-icon svg { width: 26px; height: 26px; }
.flow-item h3 { font-size: 20px; color: var(--white); letter-spacing: 0.02em; }

.flow-banner {
  margin-top: 48px;
  text-align: center;
}
.flow-banner-inner {
  padding: 0;
  text-align: center;
}
.flow-banner-text {
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 800;
  letter-spacing: 0.02em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  display: inline-block;
}
.flow-banner-sub {
  margin-top: 6px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--gray);
}

/* ============================================================
   对比表
   ============================================================ */
.compare-wrap {
  margin-top: 60px;
  border-radius: var(--radius-card);
  border: 1px solid var(--hairline-light);
  background: var(--white);
  overflow: hidden;
  box-shadow: 0 2px 14px rgba(0, 0, 0, 0.05);
}
.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}
.compare-table th, .compare-table td {
  padding: 18px 22px;
  text-align: left;
  border-top: 1px solid rgba(0, 0, 0, 0.07);
}
.compare-table thead th {
  border-top: none;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--gray-2);
  padding-block: 22px;
}
.compare-table .col-us {
  background: linear-gradient(180deg, rgba(0, 229, 176, 0.10), rgba(0, 163, 255, 0.10));
  color: var(--ink);
  font-weight: 700;
  min-width: 220px;
}
.compare-table thead .col-us {
  font-size: 17px;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.compare-table thead .col-us,
.compare-table tbody tr:first-child .col-us { position: relative; }
.compare-table .col-item { color: var(--gray-2); font-weight: 600; width: 24%; }
.compare-table tbody .col-us::before {
  content: "✓";
  margin-right: 9px;
  font-weight: 800;
  color: #00b386;
}
.compare-table tbody .col-them::before {
  content: "✕";
  margin-right: 9px;
  font-weight: 800;
  color: rgba(0, 0, 0, 0.30);
}
.compare-table .col-them { color: var(--gray-2); }

/* ============================================================
   服务流程
   ============================================================ */
.process {
  margin-top: 64px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  counter-reset: step;
}
.step {
  position: relative;
  background: var(--card-dark);
  border: 1px solid var(--hairline-dark);
  border-radius: var(--radius-card);
  padding: 34px 30px;
  transition: transform 0.35s ease, border-color 0.35s ease;
}
.step:hover { transform: translateY(-5px); border-color: rgba(0, 229, 176, 0.4); }
.step-num {
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0.1em;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
  margin-bottom: 14px;
}
.step h3 { font-size: 21px; color: var(--white); margin-bottom: 8px; }
.step p { font-size: 14.5px; color: var(--gray); }

/* ============================================================
   CTA
   ============================================================ */
.cta {
  background:
    radial-gradient(760px 420px at 50% 62%, rgba(0, 229, 176, 0.16), transparent 62%),
    var(--black);
  text-align: center;
  padding: clamp(110px, 15vw, 190px) 0;
}
.cta-title {
  font-size: clamp(36px, 6vw, 68px);
  font-weight: 800;
  letter-spacing: -0.02em;
  background: linear-gradient(180deg, #ffffff 25%, #9ff2df 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}
.cta-sub { margin-top: 18px; font-size: clamp(16px, 2vw, 20px); color: var(--gray); }
.cta .hero-cta { margin-top: 40px; }
.cta-tip {
  width: 100%;
  margin-top: 16px;
  font-size: 13px;
  color: var(--gray);
}

/* ============================================================
   FAQ
   ============================================================ */
.faq-list { margin-top: 44px; }
.faq {
  background: var(--white);
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 18px;
  margin-bottom: 14px;
  overflow: hidden;
  transition: box-shadow 0.3s ease;
}
.faq[open] { box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08); }
.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 22px 26px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  position: relative;
  padding-right: 60px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "";
  position: absolute;
  right: 26px; top: 50%;
  width: 10px; height: 10px;
  border-right: 2.2px solid var(--gray);
  border-bottom: 2.2px solid var(--gray);
  transform: translateY(-70%) rotate(45deg);
  transition: transform 0.3s ease;
}
.faq[open] summary::after { transform: translateY(-30%) rotate(225deg); }
.faq p {
  padding: 0 26px 24px;
  font-size: 15px;
  color: var(--gray-2);
  line-height: 1.75;
}

/* ============================================================
   页脚
   ============================================================ */
.footer {
  background: var(--paper);
  color: var(--gray-2);
  border-top: 1px solid var(--hairline-light);
  padding: 44px 0 56px;
}
.footer-notes { font-size: 12px; line-height: 1.7; }
.footer-notes ol { list-style: decimal; padding-left: 16px; }
.footer-notes li { margin-bottom: 8px; }
.footer-brand {
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--hairline-light);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 700;
  color: var(--ink);
}
.footer-copy { font-size: 12.5px; color: var(--gray); }

/* ---------- Toast 占位提示 ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 36px;
  transform: translateX(-50%) translateY(16px);
  background: rgba(28, 28, 30, 0.92);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid rgba(0, 229, 176, 0.35);
  color: var(--paper);
  font-size: 14px;
  padding: 12px 22px;
  border-radius: 999px;
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s ease, transform 0.35s ease, visibility 0.35s;
  z-index: 400;
  max-width: calc(100vw - 48px);
  text-align: center;
}
.toast.show {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* ---------- 弹窗（用户协议 / 客服二维码） ---------- */
body.modal-open { overflow: hidden; }

.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(0, 0, 0, 0.55);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  opacity: 0;
  transition: opacity 0.25s ease;
}
.modal-overlay[hidden] { display: none; }
.modal-overlay.show { opacity: 1; }

.modal-card {
  width: min(560px, 100%);
  max-height: calc(100vh - 48px);
  display: flex;
  flex-direction: column;
  background: var(--card-dark);
  color: var(--paper);
  border: 1px solid var(--hairline-dark);
  border-radius: 24px;
  box-shadow: 0 40px 100px rgba(0, 0, 0, 0.65);
  transform: translateY(16px) scale(0.97);
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
  outline: none;
}
.modal-overlay.show .modal-card { transform: none; }

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 26px 0;
}
.modal-head h3 { font-size: 22px; font-weight: 800; letter-spacing: -0.01em; color: var(--white); }
.modal-close {
  width: 32px; height: 32px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.10);
  color: rgba(255, 255, 255, 0.72);
  font-size: 19px;
  line-height: 1;
  cursor: pointer;
  transition: background 0.2s ease;
}
.modal-close:hover { background: rgba(255, 255, 255, 0.18); }

.modal-body {
  padding: 16px 26px;
  overflow-y: auto;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--gray);
}
.agree-note {
  background: rgba(255, 177, 0, 0.12);
  color: #ffd479;
  border: 1px solid rgba(255, 177, 0, 0.30);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 13px;
  margin-bottom: 14px;
}
.agree-list { padding-left: 18px; list-style: decimal; }
.agree-list li { margin-bottom: 10px; }
.agree-list li strong { color: rgba(255, 255, 255, 0.92); }

.modal-foot {
  padding: 14px 26px 24px;
  border-top: 1px solid var(--hairline-dark);
}
.agree-check {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--paper);
  cursor: pointer;
  user-select: none;
}
.agree-check input {
  position: absolute;
  opacity: 0;
  width: 0; height: 0;
}
.checkmark {
  flex: none;
  width: 20px; height: 20px;
  border-radius: 6px;
  border: 1.5px solid rgba(255, 255, 255, 0.35);
  position: relative;
  transition: background 0.2s ease, border-color 0.2s ease;
}
.agree-check input:checked + .checkmark {
  background: linear-gradient(120deg, #00e5b0, #00a3ff);
  border-color: transparent;
}
.checkmark::after {
  content: "";
  position: absolute;
  left: 6px; top: 3px;
  width: 5px; height: 10px;
  border-right: 2px solid #fff;
  border-bottom: 2px solid #fff;
  transform: rotate(45deg);
  opacity: 0;
  transition: opacity 0.15s ease;
}
.agree-check input:checked + .checkmark::after { opacity: 1; }
.agree-check input:focus-visible + .checkmark {
  box-shadow: 0 0 0 3px rgba(0, 163, 255, 0.3);
}
.btn-block { width: 100%; }

.qr-body {
  display: flex;
  gap: 18px;
  justify-content: center;
  padding: 22px 26px;
  overflow: visible;
}
.qr-item { flex: 1; max-width: 220px; text-align: center; }
.qr-box {
  background: #fff;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 16px;
  padding: 12px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.45);
}
.qr-svg { width: 100%; height: auto; display: block; }
.qr-name { margin-top: 12px; font-weight: 700; font-size: 15.5px; color: var(--white); }
.qr-note { margin-top: 2px; font-size: 12.5px; color: var(--gray); }
.qr-tip {
  text-align: center;
  font-size: 12px;
  color: var(--gray);
  padding: 0 26px 20px;
}

/* ============================================================
   滚动渐显动效
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal[data-delay="1"] { transition-delay: 0.12s; }
.reveal[data-delay="2"] { transition-delay: 0.24s; }
.reveal[data-delay="3"] { transition-delay: 0.36s; }
.reveal[data-delay="4"] { transition-delay: 0.48s; }
.reveal[data-delay="5"] { transition-delay: 0.6s; }
.reveal.in { opacity: 1; transform: none; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .nav-links { gap: 20px; }
  .flow-band {
    background: linear-gradient(180deg,
      rgba(0, 229, 176, 0.16) 0%,
      rgba(0, 163, 255, 0.22) 60%,
      rgba(0, 163, 255, 0.34) 100%);
    clip-path: polygon(
      0 0,
      100% 0,
      100% calc(100% - 44px),
      50% 100%,
      0 calc(100% - 44px)
    );
    padding: 26px 30px 72px;
  }
  .flow-band-items { flex-direction: column; }
  .flow-item { padding: 12px 0; }
  .flow-item + .flow-item { border-left: none; border-top: 1px solid rgba(255, 255, 255, 0.10); }
  .flow-item::before { margin-bottom: 10px; }
  .flow-item-icon { margin-bottom: 10px; }
}

@media (max-width: 860px) {
  .br-pc { display: none; }
  .br-m { display: inline; }

  .nav-burger { display: block; }
  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: #0a0a0b;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding: 8px 24px 20px;
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
  }
  body.nav-open .nav-links {
    transform: none;
    opacity: 1;
    visibility: visible;
  }
  .nav-links a {
    font-size: 17px;
    padding: 15px 4px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  }
  .nav-links a:last-child { border-bottom: none; }

  .stats { grid-template-columns: 1fr; gap: 14px; }
  .benefit-grid { grid-template-columns: 1fr; gap: 14px; }
  .pain-grid { grid-template-columns: 1fr; gap: 14px; }
  .process { grid-template-columns: repeat(2, 1fr); }
  .compare-wrap { overflow-x: auto; }
  .compare-table { min-width: 620px; }
}

@media (max-width: 760px) {
  .flow-band { padding: 18px 22px 60px; }
}

@media (max-width: 560px) {
  .process { grid-template-columns: 1fr; }
  .hero { padding-top: calc(var(--nav-h) + 48px); }
  .doc-card { width: 86vw; }
  .check-cta { flex-direction: column; align-items: flex-start; }
  .btn { font-size: 15px; padding: 12px 24px; }
  .modal-overlay { padding: 14px; align-items: flex-end; }
  .modal-card { max-height: calc(100vh - 28px); }
  .qr-body { flex-direction: column; align-items: center; gap: 22px; }
}

/* 无障碍：减少动态 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .doc-card, .breeze path, .palm { animation: none; }
  .meter-fill { transition: none; }
}