/* ============================================================
   轻语IP智能体 · 官网样式
   风格：浅色纸感 / 编辑排版 / 深绿主色 / 琥珀点缀
   ============================================================ */

:root {
  --paper: #f7f5ef;
  --paper-2: #efece3;
  --ink: #14211c;
  --ink-2: #3c4a44;
  --ink-3: #75837d;
  --line: #d9d5c9;
  --green: #0f6b4f;
  --green-2: #158a66;
  --green-soft: #dcefe6;
  --amber: #e0a11b;
  --amber-soft: #fbefd2;
  --white: #ffffff;
  --radius: 14px;
  --radius-lg: 24px;
  --shadow: 0 10px 40px rgba(20, 33, 28, 0.08);
  --shadow-sm: 0 2px 10px rgba(20, 33, 28, 0.06);
  --wrap: 1180px;
  --serif: "Songti SC", "STSong", "Noto Serif CJK SC", "Source Han Serif SC", "SimSun", Georgia, serif;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 84px; }
body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  background-image:
    radial-gradient(circle at 15% 10%, rgba(15, 107, 79, 0.06), transparent 40%),
    radial-gradient(circle at 85% 90%, rgba(224, 161, 27, 0.07), transparent 40%);
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: 0; background: none; }

.wrap { width: min(var(--wrap), 100% - 48px); margin: 0 auto; }
.serif { font-family: var(--serif); }
.em { color: var(--green); font-style: normal; }
.em-amber { color: var(--amber); font-style: normal; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 26px; border-radius: 999px;
  font-weight: 600; font-size: 15px; line-height: 1;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--green); color: #fff; box-shadow: 0 8px 24px rgba(15, 107, 79, .25); }
.btn-primary:hover { background: var(--green-2); }
.btn-outline { border: 1.5px solid var(--ink); color: var(--ink); background: transparent; }
.btn-outline:hover { background: var(--ink); color: #fff; }
.btn-ghost { color: var(--green); padding-left: 0; padding-right: 0; }
.btn-ghost:hover { transform: none; text-decoration: underline; }
.btn-sm { padding: 10px 18px; font-size: 14px; }

/* ---------- 顶部通告 ---------- */
.topbar {
  background: var(--ink); color: #e9e6dc; font-size: 13px;
  text-align: center; padding: 8px 16px;
}
.topbar b { color: var(--amber); }

/* ---------- 导航 ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(247, 245, 239, .85);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 17px; }
.brand img { width: 34px; height: 34px; border-radius: 9px; }
.brand small { display: block; font-size: 11px; color: var(--ink-3); font-weight: 500; letter-spacing: .5px; }
.nav-links { display: flex; gap: 30px; font-size: 14px; font-weight: 500; color: var(--ink-2); }
.nav-links a { position: relative; padding: 6px 0; }
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 0;
  background: var(--green); transition: width .25s ease;
}
.nav-links a:hover::after { width: 100%; }
.nav-cta { display: flex; align-items: center; gap: 12px; }
.burger { display: none; width: 40px; height: 40px; flex-direction: column; justify-content: center; gap: 5px; align-items: center; }
.burger span { width: 22px; height: 2px; background: var(--ink); display: block; transition: .25s; }

.drawer {
  position: fixed; inset: 0; z-index: 60; background: var(--paper);
  padding: 24px; display: none; flex-direction: column; gap: 6px;
}
.drawer.open { display: flex; }
.drawer-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 20px; }
.drawer a.item { padding: 14px 16px; border-radius: 12px; font-size: 17px; font-weight: 600; background: var(--white); border: 1px solid var(--line); }
.drawer .close { font-size: 28px; line-height: 1; }

/* ---------- 区块标题通用 ---------- */
.section { padding: 100px 0; }
.section-alt { background: var(--paper-2); }
.kicker {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; letter-spacing: 2px; font-weight: 700; color: var(--green); text-transform: uppercase;
  margin-bottom: 16px;
}
.kicker::before { content: ""; width: 24px; height: 2px; background: var(--green); }
.h2 { font-family: var(--serif); font-size: clamp(30px, 4vw, 44px); line-height: 1.25; font-weight: 700; letter-spacing: -.5px; }
.lead { color: var(--ink-2); font-size: 17px; max-width: 620px; margin-top: 16px; }
.head-row { display: grid; grid-template-columns: 1.2fr .8fr; gap: 40px; align-items: end; margin-bottom: 56px; }
.head-row .lead { margin-top: 0; }

/* ---------- Hero ---------- */
.hero { padding: 80px 0 60px; position: relative; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 60px; align-items: center; }
.pill {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 14px 6px 8px;
  border-radius: 999px; background: var(--white); border: 1px solid var(--line);
  font-size: 13px; color: var(--ink-2); margin-bottom: 24px; box-shadow: var(--shadow-sm);
}
.pill i { width: 8px; height: 8px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px var(--green-soft); margin-left: 4px; }
.hero h1 { font-family: var(--serif); font-size: clamp(38px, 5.4vw, 66px); line-height: 1.12; font-weight: 700; letter-spacing: -1px; }
.hero h1 .h1-kicker {
  display: block; font-family: var(--sans); font-size: 14px; font-weight: 600; letter-spacing: 2px;
  color: var(--ink-3); margin-bottom: 14px;
}
.hero h1 .underline { position: relative; display: inline-block; }
.hero h1 .underline::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 6px; height: 12px;
  background: var(--amber-soft); z-index: -1; border-radius: 4px;
}
.hero-sub { font-size: 19px; color: var(--ink-2); margin-top: 22px; }
.chain {
  display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; font-size: 13px; font-weight: 600;
}
.chain span { background: var(--white); border: 1px solid var(--line); padding: 6px 12px; border-radius: 8px; }
.chain em { color: var(--ink-3); font-style: normal; align-self: center; }
.hero-note { margin-top: 14px; font-size: 14px; color: var(--ink-3); }
.hero-actions { display: flex; gap: 14px; margin-top: 30px; flex-wrap: wrap; }

.hero-visual { position: relative; }
.hero-visual .main-shot {
  border-radius: var(--radius-lg); box-shadow: 0 30px 80px rgba(20, 33, 28, .18);
  border: 6px solid var(--white); transform: rotate(-1.5deg);
}
.hero-visual .float {
  position: absolute; border-radius: 14px; border: 4px solid var(--white);
  box-shadow: var(--shadow); width: 46%;
}
.hero-visual .float-a { right: -6%; bottom: -12%; transform: rotate(3deg); }
.hero-visual .float-b { left: -8%; top: -10%; width: 34%; transform: rotate(-4deg); filter: saturate(.8); }
.hero-visual .tag {
  position: absolute; background: var(--ink); color: #fff; font-size: 12px; font-weight: 600;
  padding: 8px 12px; border-radius: 999px; box-shadow: var(--shadow);
}
.hero-visual .tag-1 { top: 8%; right: -4%; }
.hero-visual .tag-2 { bottom: 26%; left: -10%; background: var(--green); }

.stats {
  margin-top: 90px; display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line); border-bottom: 1px solid var(--line);
}
.stat { padding: 28px 24px; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat b { display: block; font-family: var(--serif); font-size: 40px; color: var(--green); line-height: 1; }
.stat span { display: block; margin-top: 8px; font-size: 14px; color: var(--ink-2); }

/* ---------- 痛点 ---------- */
.pain-layout { display: grid; grid-template-columns: 360px 1fr; gap: 56px; align-items: start; }
.pain-side { position: sticky; top: 100px; }
.pain-side .quote {
  margin-top: 36px; padding: 28px; background: var(--ink); color: #f1eee5; border-radius: var(--radius-lg);
  font-family: var(--serif); font-size: 22px; line-height: 1.5;
}
.pain-side .quote small { display: block; margin-top: 16px; font-family: var(--sans); font-size: 14px; color: #b9b5a8; line-height: 1.7; }
.pain-side .quote small b { color: var(--amber); }
.pain-list { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.pain {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 26px; position: relative; transition: transform .25s, box-shadow .25s;
}
.pain:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.pain .num { font-family: var(--serif); font-size: 14px; color: var(--amber); font-weight: 700; letter-spacing: 1px; }
.pain h3 { font-size: 19px; margin: 10px 0 8px; }
.pain p { font-size: 14px; color: var(--ink-2); }

/* ---------- 核心功能 ---------- */
.feature-strip { display: grid; grid-template-columns: repeat(6, 1fr); gap: 0; border: 1px solid var(--line); border-radius: var(--radius-lg); overflow: hidden; background: var(--white); }
.fs {
  padding: 30px 22px; border-right: 1px solid var(--line); transition: background .25s;
}
.fs:last-child { border-right: 0; }
.fs:hover { background: var(--green-soft); }
.fs .idx { font-size: 12px; color: var(--ink-3); letter-spacing: 1px; }
.fs .ico { width: 44px; height: 44px; border-radius: 12px; background: var(--paper-2); display: grid; place-items: center; margin: 14px 0; font-size: 20px; }
.fs h3 { font-size: 17px; margin-bottom: 8px; }
.fs p { font-size: 13px; color: var(--ink-2); min-height: 66px; }
.fs .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.fs .tags span { font-size: 11px; padding: 3px 8px; border-radius: 6px; background: var(--paper-2); color: var(--ink-2); }

/* 标签页深入 */
.tabs { margin-top: 70px; }
.tab-nav { display: flex; gap: 8px; border-bottom: 1px solid var(--line); }
.tab-nav button {
  padding: 16px 22px; font-size: 15px; font-weight: 600; color: var(--ink-3);
  border-bottom: 2px solid transparent; margin-bottom: -1px; transition: .2s;
}
.tab-nav button.active { color: var(--green); border-color: var(--green); }
.tab-panel { display: none; padding-top: 44px; }
.tab-panel.active { display: grid; grid-template-columns: .9fr 1.1fr; gap: 56px; align-items: center; animation: fade .4s ease; }
.tab-panel .kicker { margin-bottom: 12px; }
.tab-panel h3 { font-family: var(--serif); font-size: 30px; line-height: 1.3; }
.tab-panel p { color: var(--ink-2); margin-top: 14px; }
.check { margin-top: 22px; display: grid; gap: 10px; }
.check li { display: flex; gap: 10px; align-items: flex-start; font-size: 15px; }
.check li::before {
  content: "✓"; flex: none; width: 22px; height: 22px; border-radius: 50%;
  background: var(--green-soft); color: var(--green); font-size: 13px; font-weight: 700;
  display: grid; place-items: center; margin-top: 3px;
}
.tab-panel img { border-radius: var(--radius-lg); border: 1px solid var(--line); box-shadow: var(--shadow); }
@keyframes fade { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }

/* ---------- 流程时间线 ---------- */
.timeline { position: relative; display: grid; grid-template-columns: 1fr 1fr; gap: 40px 80px; margin-top: 20px; }
.timeline::before {
  content: ""; position: absolute; top: 0; bottom: 0; left: 50%; width: 2px;
  background: repeating-linear-gradient(to bottom, var(--line) 0 8px, transparent 8px 16px);
}
.step { position: relative; background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 26px 26px 80px; }
.step .n {
  position: absolute; left: 22px; top: 24px; width: 42px; height: 42px; border-radius: 50%;
  background: var(--ink); color: var(--amber); font-family: var(--serif); font-weight: 700; font-size: 16px;
  display: grid; place-items: center;
}
.step h4 { font-size: 18px; margin-bottom: 6px; }
.step p { font-size: 14px; color: var(--ink-2); }
.step:nth-child(even) { transform: translateY(70px); }
.flow-foot {
  margin-top: 110px; text-align: center; padding: 26px; background: var(--green-soft);
  border-radius: var(--radius); color: var(--ink-2); font-size: 16px;
}
.flow-foot b { color: var(--green); }

/* ---------- 适用人群 ---------- */
.audience { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.aud {
  background: var(--white); border-radius: var(--radius-lg); padding: 30px; border: 1px solid var(--line);
  display: flex; flex-direction: column; gap: 10px; position: relative; overflow: hidden;
}
.aud::after {
  content: ""; position: absolute; right: -30px; top: -30px; width: 110px; height: 110px; border-radius: 50%;
  background: var(--amber-soft); opacity: .7; transition: transform .3s;
}
.aud:hover::after { transform: scale(1.4); }
.aud .emoji { font-size: 32px; position: relative; z-index: 1; }
.aud h3 { font-size: 20px; position: relative; z-index: 1; }
.aud .who { font-size: 13px; color: var(--ink-3); position: relative; z-index: 1; }
.aud p { font-size: 15px; color: var(--ink-2); position: relative; z-index: 1; }
.aud .result { margin-top: auto; font-size: 13px; font-weight: 700; color: var(--green); position: relative; z-index: 1; }

/* ---------- 为何选择 ---------- */
.why { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.why-item { padding: 34px 30px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--paper-2); transition: background .25s; }
.why-item:hover { background: var(--white); }
.why-item .num { font-family: var(--serif); font-size: 36px; color: var(--line); font-weight: 700; line-height: 1; transition: color .25s; }
.why-item:hover .num { color: var(--amber); }
.why-item h3 { font-size: 20px; margin: 16px 0 4px; }
.why-item .sub { font-size: 13px; color: var(--green); font-weight: 600; }
.why-item p { font-size: 14px; color: var(--ink-2); margin-top: 12px; }
.why-item .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 16px; }
.why-item .tags span { font-size: 12px; padding: 4px 10px; border-radius: 999px; border: 1px solid var(--line); color: var(--ink-2); background: var(--white); }

/* ---------- 价格 ---------- */
.pricing { display: grid; grid-template-columns: 1fr 1.25fr; gap: 28px; align-items: stretch; }
.plan { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 40px; display: flex; flex-direction: column; position: relative; }
.plan.hot { background: var(--ink); color: #f1eee5; border-color: var(--ink); }
.plan .badge {
  position: absolute; top: -14px; left: 40px; background: var(--amber); color: var(--ink);
  font-size: 12px; font-weight: 800; padding: 6px 14px; border-radius: 999px; letter-spacing: 1px;
}
.plan .name { font-size: 14px; font-weight: 700; letter-spacing: 1px; color: var(--ink-3); }
.plan.hot .name { color: #b9b5a8; }
.plan .price { display: flex; align-items: baseline; gap: 10px; margin: 14px 0 6px; }
.plan .price b { font-family: var(--serif); font-size: 56px; line-height: 1; }
.plan .price b small { font-size: 26px; margin-right: 4px; }
.plan .price s { color: var(--ink-3); font-size: 18px; }
.plan .price .off { font-size: 12px; background: var(--amber-soft); color: #8a5f05; padding: 3px 8px; border-radius: 6px; font-weight: 700; }
.plan.hot .price b { color: var(--amber); }
.plan .desc { font-size: 14px; color: var(--ink-3); }
.plan.hot .desc { color: #b9b5a8; }
.plan ul { margin: 26px 0; display: grid; gap: 11px; font-size: 14.5px; }
.plan li { display: flex; gap: 10px; align-items: flex-start; }
.plan li::before { content: "—"; color: var(--green); flex: none; }
.plan.hot li::before { color: var(--amber); }
.plan-qr { margin-top: auto; display: flex; gap: 18px; align-items: center; padding: 18px; background: var(--paper); border-radius: var(--radius); }
.plan.hot .plan-qr { background: rgba(255,255,255,.06); }
.plan-qr img { width: 96px; height: 96px; border-radius: 10px; border: 3px solid #fff; }
.plan-qr strong { display: block; font-size: 15px; }
.plan-qr span { display: block; font-size: 13px; color: var(--ink-3); margin-top: 4px; }
.plan.hot .plan-qr span { color: #b9b5a8; }
.plan.hot .plan-qr .btn-sm { margin-top: 10px; background: var(--amber); color: var(--ink); box-shadow: none; }
.plan .plan-qr .btn-sm { margin-top: 10px; }

/* ---------- 下载 ---------- */
.download {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 50px; align-items: center;
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 56px;
}
.download h3 { font-family: var(--serif); font-size: 32px; line-height: 1.3; }
.download p { color: var(--ink-2); margin-top: 14px; }
.download .tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.download .tags span { font-size: 13px; padding: 6px 12px; border-radius: 8px; background: var(--paper-2); }
.dl-steps { display: grid; gap: 14px; }
.dl-steps li { display: flex; gap: 16px; align-items: center; padding: 18px 20px; background: var(--paper); border-radius: var(--radius); font-weight: 600; }
.dl-steps li b { font-family: var(--serif); color: var(--green); font-size: 22px; width: 30px; }

/* ---------- FAQ ---------- */
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 28px; align-items: start; }
details { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 0 22px; }
details[open] { border-color: var(--green); }
summary {
  list-style: none; cursor: pointer; padding: 18px 0; font-weight: 600; font-size: 16px;
  display: flex; justify-content: space-between; align-items: center; gap: 14px;
}
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; font-size: 22px; color: var(--green); transition: transform .25s; flex: none; }
details[open] summary::after { transform: rotate(45deg); }
details p { padding: 0 0 20px; color: var(--ink-2); font-size: 15px; }

/* ---------- 底部 CTA ---------- */
.final {
  background: var(--ink); color: #f1eee5; border-radius: var(--radius-lg); padding: 70px 60px;
  display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: center; position: relative; overflow: hidden;
}
.final::before {
  content: ""; position: absolute; width: 400px; height: 400px; border-radius: 50%;
  background: radial-gradient(circle, rgba(15,107,79,.6), transparent 70%); right: -100px; top: -150px;
}
.final h2 { font-family: var(--serif); font-size: clamp(28px, 3.6vw, 42px); line-height: 1.3; position: relative; }
.final h2 span { color: var(--amber); }
.final p { color: #b9b5a8; margin-top: 16px; max-width: 560px; position: relative; }
.final .actions { display: flex; gap: 14px; margin-top: 28px; flex-wrap: wrap; position: relative; }
.final .btn-outline { border-color: #f1eee5; color: #f1eee5; }
.final .btn-outline:hover { background: #f1eee5; color: var(--ink); }
.final .qr { background: #fff; padding: 14px; border-radius: 16px; text-align: center; color: var(--ink); position: relative; }
.final .qr img { width: 160px; height: 160px; }
.final .qr small { display: block; margin-top: 8px; font-size: 12px; color: var(--ink-3); }

/* ---------- Footer ---------- */
footer { padding: 70px 0 30px; border-top: 1px solid var(--line); margin-top: 100px; }
.foot-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px; }
.foot-grid p { font-size: 14px; color: var(--ink-2); margin-top: 14px; max-width: 360px; }
.foot-grid h5 { font-size: 14px; letter-spacing: 1px; margin-bottom: 14px; }
.foot-grid li { font-size: 14px; color: var(--ink-2); margin-bottom: 8px; }
.foot-grid li a:hover { color: var(--green); }
.foot-kw { margin-top: 44px; font-size: 12px; color: var(--ink-3); line-height: 1.9; }
.foot-bottom { margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--line); font-size: 12px; color: var(--ink-3); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }

/* ---------- 浮动咨询 + 弹窗 ---------- */
.float-qr { position: fixed; right: 22px; bottom: 26px; z-index: 40; }
.float-qr .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--amber); animation: pulse 1.6s infinite; flex: none; }
.fq-card {
  width: 196px; padding: 16px 16px 18px; background: var(--white); border: 1px solid var(--line);
  border-radius: 18px; box-shadow: 0 18px 50px rgba(20,33,28,.18); text-align: center; position: relative;
  animation: fade .35s ease;
}
.fq-close {
  position: absolute; top: 6px; right: 10px; font-size: 22px; line-height: 1; color: var(--ink-3);
}
.fq-close:hover { color: var(--ink); }
.fq-head { display: flex; align-items: center; justify-content: center; gap: 8px; font-size: 12px; font-weight: 700; color: var(--green); letter-spacing: 1px; }
.fq-card img { width: 148px; height: 148px; margin: 12px auto 10px; border-radius: 10px; border: 1px solid var(--line); }
.fq-card strong { display: block; font-size: 15px; }
.fq-card span:not(.dot) { display: block; font-size: 12px; color: var(--ink-3); margin-top: 4px; line-height: 1.5; }
.fq-pill {
  display: none; align-items: center; gap: 10px; padding: 12px 18px;
  background: var(--green); color: #fff; border-radius: 999px; font-weight: 600; font-size: 14px;
  box-shadow: 0 12px 30px rgba(15,107,79,.35); animation: fade .3s ease;
}
.fq-pill:hover { background: var(--green-2); }
.float-qr.closed .fq-card { display: none; }
.float-qr.closed .fq-pill { display: flex; }
@keyframes pulse { 0%,100% { box-shadow: 0 0 0 0 rgba(224,161,27,.6); } 50% { box-shadow: 0 0 0 8px rgba(224,161,27,0); } }

.modal { position: fixed; inset: 0; z-index: 70; display: none; place-items: center; background: rgba(20,33,28,.6); backdrop-filter: blur(6px); padding: 20px; }
.modal.open { display: grid; }
.modal-box { background: var(--white); border-radius: var(--radius-lg); padding: 36px; width: min(380px, 100%); text-align: center; position: relative; animation: fade .3s; }
.modal-box .x { position: absolute; top: 12px; right: 16px; font-size: 26px; color: var(--ink-3); }
.modal-box h3 { font-family: var(--serif); font-size: 24px; }
.modal-box .sub { color: var(--ink-3); font-size: 14px; margin-top: 6px; }
.modal-box img { width: 220px; height: 220px; margin: 22px auto; border-radius: 12px; border: 1px solid var(--line); }
.modal-box p b { color: var(--green); }

/* ---------- 滚动显现 ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- 关于页 ---------- */
.page-hero { padding: 40px 0 60px; text-align: center; }
.crumbs { display: flex; gap: 10px; font-size: 13px; color: var(--ink-3); margin-bottom: 50px; }
.crumbs a:hover { color: var(--green); }
.crumbs [aria-current] { color: var(--ink-2); }
.page-hero h1 { font-family: var(--serif); font-size: clamp(34px, 5vw, 58px); line-height: 1.2; }
.page-hero p { max-width: 720px; margin: 20px auto 0; color: var(--ink-2); font-size: 17px; }
.about-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 50px; }
.about-stats div { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; text-align: center; }
.about-stats b { font-family: var(--serif); font-size: 40px; color: var(--green); display: block; line-height: 1; }
.about-stats b small { font-size: 18px; }
.about-stats span { font-size: 13px; color: var(--ink-3); margin-top: 8px; display: block; }
.trio { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.trio .card { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius-lg); padding: 32px; }
.trio .card .emoji { font-size: 30px; }
.trio .card h3 { font-size: 20px; margin: 14px 0 8px; }
.trio .card p { font-size: 14.5px; color: var(--ink-2); }
.trio .card .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 16px; }
.trio .card .tags span { font-size: 12px; padding: 4px 10px; border-radius: 999px; background: var(--green-soft); color: var(--green); font-weight: 600; }
.tech { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.tech img { border-radius: var(--radius-lg); border: 1px solid var(--line); box-shadow: var(--shadow); }
.tech h3 { font-family: var(--serif); font-size: 26px; margin-bottom: 8px; }
.cap-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.cap { background: var(--white); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.cap .num { font-family: var(--serif); color: var(--amber); font-weight: 700; font-size: 14px; letter-spacing: 1px; }
.cap h4 { font-size: 17px; margin: 8px 0 6px; }
.cap p { font-size: 14px; color: var(--ink-2); }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .feature-strip { grid-template-columns: repeat(3, 1fr); }
  .fs:nth-child(3n) { border-right: 0; }
  .fs:nth-child(-n+3) { border-bottom: 1px solid var(--line); }
  .fs p { min-height: 0; }
  .pain-layout { grid-template-columns: 1fr; }
  .pain-side { position: static; }
  .why, .audience, .trio, .cap-grid { grid-template-columns: 1fr 1fr; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .about-stats { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 860px) {
  .nav-links, .nav-cta .btn { display: none; }
  .burger { display: flex; }
  .hero { padding-top: 50px; }
  .hero-grid, .head-row, .pricing, .download, .tech, .faq-grid { grid-template-columns: 1fr; }
  .hero-visual { margin-top: 60px; }
  .hero-visual .float-b { display: none; }
  .hero-visual .float-a { right: 0; bottom: -8%; }
  .hero-visual .tag-1 { right: 0; }
  .hero-visual .tag-2 { left: 0; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .pain-list { grid-template-columns: 1fr; }
  .tab-panel.active { grid-template-columns: 1fr; }
  .tab-nav { overflow-x: auto; }
  .tab-nav button { white-space: nowrap; }
  .timeline { grid-template-columns: 1fr; gap: 18px; }
  .timeline::before { display: none; }
  .step:nth-child(even) { transform: none; }
  .flow-foot { margin-top: 40px; }
  .why, .audience, .trio, .cap-grid { grid-template-columns: 1fr; }
  .final { grid-template-columns: 1fr; padding: 44px 28px; }
  .download { padding: 32px 24px; }
  .section { padding: 70px 0; }
  .plan { padding: 28px; }
}
@media (max-width: 520px) {
  .about-stats, .foot-grid { grid-template-columns: 1fr; }
  .plan .price b { font-size: 44px; }
  .fq-pill .txt { display: none; }
  .fq-pill { padding: 14px; }
  .float-qr { right: 14px; bottom: 16px; }
  .fq-card { width: 168px; padding: 14px; }
  .fq-card img { width: 124px; height: 124px; }
}