/* 行水数据标注工具 · 官网样式(Liquid Glass 液态玻璃风) */

:root {
  --primary: #1B66FF;
  --primary-hover: #1554D6;
  --primary-weak: #F0F6FF;
  --text: #1F2D3D;
  --text-2: #6B7280;
  --text-3: #9AA5B4;
  --border: #E5E9F0;
  --bg: #F4F8FF;
  --nav-h: 60px;
  /* 玻璃配方 */
  --glass-bg: rgba(255, 255, 255, .60);
  --glass-bg-strong: rgba(255, 255, 255, .78);
  --glass-border: rgba(255, 255, 255, .65);
  --glass-blur: blur(18px) saturate(1.6);
  --glass-hi: inset 0 1px 0 rgba(255, 255, 255, .70), inset 0 -1px 0 rgba(31, 45, 61, .04);
  --glass-shadow: 0 8px 32px rgba(31, 45, 61, .10);
  --radius: 16px;
}

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

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 42px); }

body {
  font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 全局液态彩色光斑(玻璃折射的底色) */
body::before, body::after {
  content: '';
  position: fixed;
  border-radius: 50%;
  filter: blur(90px);
  z-index: -1;
  pointer-events: none;
}
body::before {
  width: 560px; height: 560px;
  left: -180px; top: -160px;
  background: rgba(27, 102, 255, .20);
}
body::after {
  width: 480px; height: 480px;
  right: -160px; top: 38%;
  background: rgba(79, 195, 247, .18);
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 860px; }
.link { color: var(--primary); }
.link:hover { color: var(--primary-hover); }

/* ---------- 按钮体系(液态玻璃胶囊) ---------- */
.btn {
  position: relative;
  display: inline-block;
  background: linear-gradient(180deg, #3D82FF 0%, #1B66FF 100%);
  color: #FFFFFF;
  border: 1px solid rgba(255, 255, 255, .28);
  border-radius: 999px;
  padding: 11px 26px;
  font-size: 14px;
  line-height: 1.4;
  cursor: pointer;
  font-family: inherit;
  text-align: center;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .38), inset 0 -1px 0 rgba(0, 0, 0, .08),
              0 8px 22px rgba(27, 102, 255, .34);
  transition: box-shadow .2s, transform .2s, filter .2s;
  overflow: hidden;
}
/* 顶部玻璃高光带 */
.btn::after {
  content: '';
  position: absolute;
  inset: 1px;
  border-radius: inherit;
  background: linear-gradient(180deg, rgba(255, 255, 255, .28), rgba(255, 255, 255, 0) 52%);
  pointer-events: none;
}
.btn:hover {
  filter: brightness(1.06);
  transform: translateY(-1px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .40), inset 0 -1px 0 rgba(0, 0, 0, .08),
              0 12px 30px rgba(27, 102, 255, .42);
}
.btn:active { transform: translateY(0); }
.btn-sm { padding: 8px 20px; font-size: 13px; }
.btn-lg { padding: 14px 36px; font-size: 16px; }
.btn-plain {
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  color: var(--primary);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-hi), var(--glass-shadow);
}
.btn-plain:hover {
  background: rgba(255, 255, 255, .85);
  color: var(--primary-hover);
  filter: none;
}
.btn-white {
  background: rgba(255, 255, 255, .94);
  color: var(--primary);
  border-color: rgba(255, 255, 255, .9);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 1), 0 10px 28px rgba(10, 40, 110, .35);
  font-weight: bold;
}
.btn-white:hover {
  background: #FFFFFF;
  color: var(--primary-hover);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 1), 0 14px 34px rgba(10, 40, 110, .42);
}
.btn-disabled {
  background: rgba(255, 255, 255, .25);
  border-color: transparent;
  color: rgba(255, 255, 255, .9);
  cursor: not-allowed;
  box-shadow: none;
}

/* ---------- 导航(悬浮玻璃胶囊条) ---------- */
.nav {
  position: fixed;
  top: 14px; left: 16px; right: 16px;
  height: var(--nav-h);
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 22px;
  box-shadow: var(--glass-hi), 0 8px 28px rgba(31, 45, 61, .09);
  z-index: 100;
  transition: background .25s, box-shadow .25s;
}
.nav.scrolled {
  background: var(--glass-bg-strong);
  box-shadow: var(--glass-hi), 0 12px 36px rgba(31, 45, 61, .14);
}
.nav-inner { height: var(--nav-h); display: flex; align-items: center; justify-content: space-between; padding: 0 8px 0 20px; }
.nav-logo img { height: 34px; width: auto; }
.nav-menu { display: flex; align-items: center; gap: 6px; }
.nav-menu > a {
  font-size: 14px; color: #3D4A5C;
  padding: 7px 14px;
  border-radius: 999px;
  transition: background .18s, color .18s;
}
.nav-menu > a:hover { color: var(--primary); background: rgba(27, 102, 255, .08); }
.nav-menu > a.active { color: var(--primary); background: rgba(27, 102, 255, .12); }
.nav-menu .btn { color: #fff; margin-left: 8px; }
.nav-toggle { display: none; background: none; border: none; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--text); margin: 4px 0; border-radius: 2px; transition: transform .2s, opacity .2s; }

/* 顶部用户区 */
.nav-user { display: flex; align-items: center; margin-left: 14px; }
.nav-user-chip {
  display: flex; align-items: center; gap: 8px;
  padding: 3px 14px 3px 4px;
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  background: rgba(255, 255, 255, .55);
  font-size: 13.5px; color: var(--text);
  transition: box-shadow .2s, background .2s;
}
.nav-user-chip:hover {
  background: rgba(255, 255, 255, .85);
  box-shadow: var(--glass-hi), 0 6px 18px rgba(27, 102, 255, .18);
}
.nav-user-name { max-width: 96px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nav-avatar { width: 28px; height: 28px; border-radius: 50%; object-fit: cover; display: inline-block; }
.nav-avatar-def {
  display: flex; align-items: center; justify-content: center;
  background: var(--primary); color: #fff; font-weight: bold; font-size: 13px;
}
.btn-ghost-nav {
  background: rgba(255, 255, 255, .6);
  color: var(--primary);
  border-color: rgba(27, 102, 255, .35);
  box-shadow: var(--glass-hi), 0 4px 14px rgba(27, 102, 255, .16);
}
.btn-ghost-nav:hover { background: var(--primary); color: #FFFFFF; filter: none; }

/* ---------- 首屏 ---------- */
.hero { position: relative; padding: calc(var(--nav-h) + 92px) 0 96px; overflow: hidden; }
.hero-blob {
  position: absolute;
  width: 640px; height: 640px;
  right: -140px; top: -220px;
  background: rgba(90, 167, 255, .28);
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}
.hero-inner { position: relative; display: flex; align-items: center; gap: 48px; }
.hero-text { flex: 1; min-width: 0; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-hi), 0 4px 16px rgba(31, 45, 61, .07);
  font-size: 12.5px; color: #3D4A5C;
  margin-bottom: 20px;
}
.hero-badge .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: #22C55E;
  box-shadow: 0 0 0 3px rgba(34, 197, 94, .22);
}
.hero-text h1 {
  font-size: 42px;
  line-height: 1.28;
  letter-spacing: .5px;
  color: var(--text);
}
.hero-sub { margin-top: 18px; font-size: 16px; color: var(--text-2); max-width: 520px; }
.hero-btns { margin-top: 34px; display: flex; gap: 14px; flex-wrap: wrap; }
.hero-img { flex: 0 0 44%; display: flex; justify-content: center; }
.hero-img img {
  max-width: 460px; width: 100%;
  filter: drop-shadow(0 24px 44px rgba(27, 102, 255, .22));
}

/* ---------- 通用区块 ---------- */
.section { padding: 88px 0; }
.section-alt { background: rgba(240, 246, 255, .55); }
.sec-head { text-align: center; margin-bottom: 52px; }
.sec-head h2 { font-size: 30px; color: var(--text); }
.sec-head p { margin-top: 10px; color: var(--text-2); font-size: 15px; }

/* ---------- 功能卡片(玻璃卡) ---------- */
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.feature-card {
  position: relative;
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 30px 26px;
  box-shadow: var(--glass-hi), var(--glass-shadow);
  transition: transform .25s, box-shadow .25s, background .25s;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(180deg, rgba(255, 255, 255, .34), rgba(255, 255, 255, 0) 46%);
  pointer-events: none;
}
.feature-card:hover {
  transform: translateY(-6px);
  background: rgba(255, 255, 255, .78);
  box-shadow: var(--glass-hi), 0 18px 44px rgba(27, 102, 255, .16);
}
.feature-icon {
  width: 50px; height: 50px;
  border-radius: 14px;
  background: rgba(27, 102, 255, .12);
  border: 1px solid rgba(27, 102, 255, .18);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .55);
  color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
}
.feature-icon svg { width: 26px; height: 26px; }
.feature-card h3 { font-size: 17px; margin-bottom: 8px; position: relative; }
.feature-card p { font-size: 13.5px; color: var(--text-2); line-height: 1.75; position: relative; }

/* ---------- 截图(玻璃相框) ---------- */
.shot-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.shot {
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 10px 10px 0;
  box-shadow: var(--glass-hi), var(--glass-shadow);
  cursor: zoom-in;
  transition: transform .25s, box-shadow .25s;
}
.shot:hover {
  transform: translateY(-6px);
  box-shadow: var(--glass-hi), 0 18px 44px rgba(27, 102, 255, .16);
}
.shot img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; border-radius: 12px; }
.shot figcaption { padding: 13px 8px; font-size: 13.5px; color: #3D4A5C; }

/* ---------- 下载(深蓝玻璃主卡) ---------- */
.download-card {
  position: relative;
  background: linear-gradient(135deg, rgba(27, 102, 255, .96) 0%, rgba(16, 70, 190, .92) 100%);
  -webkit-backdrop-filter: blur(24px) saturate(1.5);
  backdrop-filter: blur(24px) saturate(1.5);
  border: 1px solid rgba(255, 255, 255, .30);
  border-radius: 26px;
  padding: 52px 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  color: #FFFFFF;
  flex-wrap: wrap;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .30), 0 22px 60px rgba(16, 70, 190, .40);
  overflow: hidden;
}
/* 卡面流光高光 */
.download-card::before {
  content: '';
  position: absolute;
  width: 420px; height: 420px;
  border-radius: 50%;
  right: -100px; top: -240px;
  background: rgba(255, 255, 255, .14);
  filter: blur(60px);
  pointer-events: none;
}
.dl-info h2 { font-size: 27px; color: #FFFFFF; position: relative; }
.dl-version { margin-top: 8px; font-size: 14px; color: rgba(255, 255, 255, .88); position: relative; }
.dl-note { margin-top: 4px; font-size: 13px; color: rgba(255, 255, 255, .72); position: relative; }
.dl-action { text-align: center; position: relative; }
.dl-tip { margin-top: 12px; font-size: 12.5px; color: rgba(255, 255, 255, .78); }

/* ---------- FAQ(玻璃手风琴) ---------- */
.faq-item {
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  margin-bottom: 12px;
  box-shadow: var(--glass-hi), 0 4px 16px rgba(31, 45, 61, .06);
  overflow: hidden;
  transition: background .2s, box-shadow .2s;
}
.faq-item.open {
  background: rgba(255, 255, 255, .82);
  box-shadow: var(--glass-hi), 0 10px 30px rgba(27, 102, 255, .12);
}
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  padding: 17px 22px;
  font-size: 15px;
  font-weight: bold;
  color: var(--text);
  font-family: inherit;
}
.faq-arrow { color: var(--text-3); font-size: 13px; transition: transform .2s; flex: 0 0 auto; }
.faq-item.open .faq-arrow { transform: rotate(180deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .25s ease; }
.faq-a p { padding: 0 22px 19px; color: var(--text-2); font-size: 14px; line-height: 1.8; }
.faq-item.open .faq-a { max-height: 400px; }

/* ---------- 关于 / 联系(玻璃卡) ---------- */
.about-grid { display: grid; grid-template-columns: 1.6fr 1fr; gap: 22px; align-items: stretch; }
.about-card {
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 30px;
  box-shadow: var(--glass-hi), var(--glass-shadow);
}
.about-logo { height: 50px; width: auto; margin-bottom: 16px; }
.about-intro p { color: var(--text-2); font-size: 14px; line-height: 1.9; }
.contact-list {
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 10px 28px;
  box-shadow: var(--glass-hi), var(--glass-shadow);
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.contact-item {
  display: flex;
  gap: 16px;
  padding: 13px 0;
  font-size: 14px;
  border-bottom: 1px solid rgba(31, 45, 61, .06);
}
.contact-item:last-child { border-bottom: none; }
.ci-label { color: var(--text-3); flex: 0 0 72px; }
.contact-item span:last-child { color: var(--text); word-break: break-all; }

/* ---------- 页脚 ---------- */
.footer {
  background: rgba(255, 255, 255, .55);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border-top: 1px solid var(--glass-border);
  padding: 32px 0;
}
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.footer-brand { display: flex; align-items: center; gap: 10px; color: var(--text-2); font-size: 14px; }
.footer-brand img { height: 30px; width: auto; opacity: .9; }
.footer-meta { text-align: right; color: var(--text-3); font-size: 12.5px; line-height: 2; }
.footer-meta a { color: var(--text-3); }
.footer-meta a:hover { color: var(--primary); }

/* ---------- 灯箱(毛玻璃) ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, .62);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
}
.lightbox[hidden] { display: none; }
.lightbox img {
  max-width: 94vw;
  max-height: 88vh;
  border-radius: 16px;
  background: #FFFFFF;
  box-shadow: 0 24px 72px rgba(0, 0, 0, .40);
}
.lightbox-close {
  position: absolute;
  top: 18px; right: 24px;
  background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .25);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  color: #FFFFFF;
  font-size: 28px;
  width: 44px; height: 44px;
  border-radius: 50%;
  cursor: pointer;
  line-height: 1;
  transition: background .15s;
}
.lightbox-close:hover { background: rgba(255, 255, 255, .28); }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .nav { left: 12px; right: 12px; }
  .nav-toggle { display: block; }
  .nav-menu {
    position: fixed;
    top: calc(var(--nav-h) + 24px);
    left: 12px; right: 12px;
    background: rgba(255, 255, 255, .88);
    -webkit-backdrop-filter: blur(20px) saturate(1.6);
    backdrop-filter: blur(20px) saturate(1.6);
    border: 1px solid var(--glass-border);
    border-radius: 18px;
    box-shadow: var(--glass-hi), 0 16px 44px rgba(31, 45, 61, .16);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px 18px 16px;
    display: none;
  }
  .nav-menu.open { display: flex; }
  .nav-menu > a { padding: 12px 8px; border-bottom: 1px solid rgba(31, 45, 61, .06); }
  .nav-menu > a:hover, .nav-menu > a.active { background: none; }
  .nav-menu .btn { margin-top: 14px; text-align: center; }

  .hero { padding: calc(var(--nav-h) + 74px) 0 60px; }
  .hero-inner { flex-direction: column; text-align: center; gap: 36px; }
  .hero-text h1 { font-size: 31px; }
  .hero-sub { margin-left: auto; margin-right: auto; }
  .hero-btns { justify-content: center; }
  .hero-img { flex: none; }
  .hero-img img { max-width: 360px; }

  .section { padding: 60px 0; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .shot-grid { grid-template-columns: 1fr 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .footer-meta { text-align: left; }
}

@media (max-width: 560px) {
  .hero-text h1 { font-size: 27px; }
  .feature-grid, .shot-grid { grid-template-columns: 1fr; }
  .sec-head h2 { font-size: 24px; }
  .download-card { padding: 38px 28px; border-radius: 22px; }
  .dl-action { width: 100%; }
  .nav-logo img { height: 28px; }
}