:root {
  --bg: #FAFAFC;
  --card: #FFFFFF;
  --ink: #1D1D1F;
  --ink-2: #515154;
  --ink-3: #86868B;
  --line: #E5E5EA;
  --blue: #0071E3;
  --blue-d: #0077ED;
  --radius: 20px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  line-height: 1.6;
}
a { text-decoration: none; color: inherit; }
.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ---------- 导航 ---------- */
/* 沿用整站默认 header（bootstrap + style.css），此处仅做局部微调 */
header .navbar-default { background-color: rgba(255,255,255,.92); }

/* ---------- Hero ---------- */
.hero {
  text-align: center;
  background: linear-gradient(180deg, #F0F4F8 0%, #FAFAFC 100%);
  padding: 96px 0 64px;
}
.hero .tag { font-size: 19px; font-weight: 600; color: var(--blue); letter-spacing: 2px; margin-bottom: 10px; }
.hero h1 { display: flex; align-items: center; justify-content: center; gap: 18px; font-size: 64px; font-weight: 700; letter-spacing: -1.5px; }
.hero h1 img { width: 68px; height: 68px; border-radius: 16px; box-shadow: 0 10px 30px rgba(0,0,0,.15); }
.hero .sub { font-size: 24px; color: var(--ink-3); font-weight: 500; margin: 14px 0 26px; }
.hero .des { font-size: 17px; color: var(--ink-2); max-width: 680px; margin: 0 auto 36px; }
.hero-btns { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
/* 覆盖整站 style.css 的全局 .btn（width/height/line-height/margin/font-size） */
.btn { display: inline-block; width: auto; height: auto; line-height: 1.5; margin: 0; padding: 13px 34px; border-radius: 26px; font-size: 17px; font-weight: 600; transition: all .25s; }
.btn-blue { background: var(--blue); color: #fff; box-shadow: 0 6px 18px rgba(0,113,227,.32); }
.btn-blue:hover { background: var(--blue-d); transform: translateY(-2px); }
.btn-gray { background: #E5E5EA; color: var(--ink); }
.btn-gray:hover { background: #D1D1D6; transform: translateY(-2px); }
.hero-note { margin-top: 18px; font-size: 13px; color: var(--ink-3); }
@media (max-width: 640px) { .hero h1 { font-size: 42px; } .hero h1 img { width: 52px; height: 52px; } .hero .sub { font-size: 19px; } }

/* ---------- 展示区 ---------- */
.shots { padding: 70px 0 80px; }
.shots-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 28px; }
@media (max-width: 900px) { .shots-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; } }
.shot-card { background: var(--bg); border: 1px solid var(--line); border-radius: 18px; padding: 14px; box-shadow: 0 10px 30px rgba(0,0,0,.05); transition: transform .35s ease, box-shadow .35s ease; margin: 0; }
.shot-card:hover { transform: translateY(-8px); box-shadow: 0 16px 40px rgba(0,0,0,.08); }
.shot-card img { width: 100%; height: auto; border-radius: 10px; display: block; box-shadow: 0 2px 8px rgba(0,0,0,.08); }
.shot-card figcaption { text-align: center; padding: 12px 4px 2px; }
.shot-card .cap-t { font-size: 15.5px; font-weight: 600; color: var(--ink); }
.shot-card .cap-d { font-size: 13px; color: var(--ink-3); margin-top: 2px; }

/* ---------- 数字条 ---------- */
.stats { background: #fff; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 44px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }
@media (max-width: 640px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }
.stat .num { font-size: 34px; font-weight: 700; color: var(--blue); letter-spacing: -.5px; }
.stat .lab { font-size: 13.5px; color: var(--ink-3); margin-top: 2px; }

/* ---------- 特性 ---------- */
.features { padding: 84px 0; }
.sec-head { text-align: center; margin-bottom: 48px; }
.sec-head h2 { font-size: 38px; font-weight: 700; letter-spacing: -.5px; }
.sec-head p { font-size: 17px; color: var(--ink-3); margin-top: 8px; }
.feat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
@media (max-width: 760px) { .feat-grid { grid-template-columns: 1fr; } }
.feat-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 38px 36px; transition: all .3s; }
.feat-card:hover { box-shadow: 0 14px 36px rgba(0,0,0,.07); border-color: var(--blue); transform: translateY(-4px); }
.feat-ic { width: 52px; height: 52px; border-radius: 13px; display: flex; align-items: center; justify-content: center; margin-bottom: 20px; }
.feat-ic svg { width: 26px; height: 26px; }
.feat-card h3 { font-size: 21px; font-weight: 600; margin-bottom: 10px; }
.feat-card p { font-size: 15px; color: var(--ink-3); }
.ic-blue { background: #E6F1FB; color: #185FA5; }
.ic-green { background: #EAF3DE; color: #3B6D11; }
.ic-amber { background: #FAEEDA; color: #854F0B; }
.ic-purple { background: #EEEDFE; color: #534AB7; }

/* ---------- 三步上手 ---------- */
.steps { background: #fff; border-top: 1px solid var(--line); padding: 84px 0; }
.steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
@media (max-width: 760px) { .steps-grid { grid-template-columns: 1fr; } }
.step { text-align: center; padding: 10px 18px; }
.step .no { width: 44px; height: 44px; border-radius: 50%; background: var(--blue); color: #fff; font-size: 19px; font-weight: 700; line-height: 44px; margin: 0 auto 16px; }
.step h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.step p { font-size: 14.5px; color: var(--ink-3); }

/* ---------- 兼容与授权 ---------- */
.compat { padding: 84px 0; }
.compat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
@media (max-width: 760px) { .compat-grid { grid-template-columns: 1fr; } }
.compat-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 32px 30px; }
.compat-card .name { font-size: 17px; font-weight: 600; margin-bottom: 14px; }
.compat-card ul { list-style: none; }
.compat-card li { font-size: 14.5px; color: var(--ink-2); padding: 5px 0 5px 18px; position: relative; }
.compat-card li::before { content: ""; position: absolute; left: 0; top: 13px; width: 7px; height: 7px; border-radius: 50%; background: var(--blue); }
.compat-card li b { font-weight: 600; color: var(--ink); }

/* ---------- FAQ ---------- */
.faq { background: #fff; border-top: 1px solid var(--line); padding: 84px 0; }
.faq-list { max-width: 760px; margin: 0 auto; }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary { cursor: pointer; list-style: none; padding: 20px 4px; font-size: 16.5px; font-weight: 600; display: flex; justify-content: space-between; align-items: center; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-size: 22px; font-weight: 400; color: var(--ink-3); transition: transform .2s; }
.faq details[open] summary::after { transform: rotate(45deg); }
.faq .a { padding: 0 4px 20px; font-size: 15px; color: var(--ink-3); max-width: 700px; }

/* ---------- 底部 CTA ---------- */
.cta { padding: 84px 0; }
.cta-card { background: linear-gradient(135deg, #0071E3 0%, #0055B8 100%); border-radius: 28px; text-align: center; padding: 70px 30px; color: #fff; }
.cta-card h2 { font-size: 34px; font-weight: 700; margin-bottom: 12px; }
.cta-card p { font-size: 16px; opacity: .85; margin-bottom: 30px; }
.btn-white { background: #fff; color: var(--blue); }
.btn-white:hover { transform: translateY(-2px); box-shadow: 0 8px 22px rgba(0,0,0,.2); }

/* 页脚沿用整站默认样式（style.css） */

/* ---------- 滚动浮现 ---------- */
body.js .reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s ease, transform .7s ease; }
body.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { body.js .reveal { opacity: 1; transform: none; transition: none; } }