/* ============================================================
   延安大学咸阳医院 · 住培管理系统  ·  设计规范
   品牌：红(#C8102E) + 深蓝(#0B1F3A) + 金(#C8A45C)
   气质：简洁 · 大气 · 高端 · 医疗科技
   ============================================================ */

:root {
  /* 品牌色 */
  --c-red: #C8102E;
  --c-red-600: #E11D3A;
  --c-red-700: #9E0C24;
  --c-navy: #0B1F3A;
  --c-navy-2: #11294D;
  --c-navy-3: #1B3A66;
  --c-blue: #1E6FB8;
  --c-blue-600: #2F8FD6;
  --c-gold: #C8A45C;
  --c-gold-soft: #E4CE9B;

  /* 中性 */
  --ink: #16203A;
  --muted: #5B6678;
  --muted-2: #8A93A6;
  --line: #E7EBF2;
  --line-soft: #F0F3F8;
  --bg: #F4F6FB;
  --bg-2: #EEF2F9;
  --card: #FFFFFF;

  /* 系统九色（用于卡片强调） */
  --s1: #1E6FB8; /* 学员管理 - 蓝 */
  --s2: #0E9C8A; /* 轮转科室 - 青 */
  --s3: #C8102E; /* 质量监控 - 红 */
  --s4: #6C4FD8; /* 智能轮转 - 紫 */
  --s5: #B8862F; /* 督导管理 - 金 */
  --s6: #E0761E; /* 自评系统 - 橙 */
  --s7: #2E5BFF; /* 师资管理 - 靛 */
  --s8: #12A6B6; /* 360评价 - 蓝绿 */
  --s9: #475569; /* 资料归档 - 岩灰 */

  /* 阴影 */
  --sh-sm: 0 1px 3px rgba(16, 32, 58, .06), 0 1px 2px rgba(16, 32, 58, .04);
  --sh-md: 0 10px 30px -12px rgba(16, 32, 58, .18);
  --sh-lg: 0 30px 60px -20px rgba(16, 32, 58, .28);
  --sh-glow: 0 20px 50px -16px rgba(200, 16, 46, .35);

  /* 字体 */
  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", -apple-system,
    BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-num: "DIN Alternate", "Bahnschrift", "Helvetica Neue", var(--font-sans);

  --radius: 16px;
  --radius-sm: 12px;
  --maxw: 1240px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ============================================================
   顶部导航
   ============================================================ */
.topbar {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  background: rgba(255, 255, 255, .78);
  border-bottom: 1px solid var(--line);
  transition: box-shadow .3s, background .3s;
}
.topbar.scrolled { box-shadow: var(--sh-md); background: rgba(255, 255, 255, .92); }
.topbar .wrap {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand .emblem {
  width: 42px; height: 42px; border-radius: 11px;
  background: linear-gradient(140deg, var(--c-red), var(--c-red-700));
  display: grid; place-items: center; color: #fff;
  box-shadow: 0 6px 16px -6px rgba(200, 16, 46, .6);
  flex: none;
}
.brand .emblem svg { width: 24px; height: 24px; }
.brand .txt b {
  font-size: 16px; letter-spacing: .5px; color: var(--ink);
  display: block; line-height: 1.2;
}
.brand .txt span {
  font-size: 11.5px; color: var(--muted-2); letter-spacing: 2px;
}
.topnav { display: flex; align-items: center; gap: 6px; }
.topnav a {
  font-size: 14px; color: var(--muted); padding: 8px 14px; border-radius: 9px;
  transition: .2s; font-weight: 500;
}
.topnav a:hover { color: var(--c-red); background: rgba(200, 16, 46, .06); }
.topbar .acts { display: flex; align-items: center; gap: 10px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px; font-weight: 600; cursor: pointer;
  padding: 9px 18px; border-radius: 10px; border: 1px solid transparent;
  transition: .25s; white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--c-red), var(--c-red-700));
  color: #fff; box-shadow: 0 10px 24px -10px rgba(200, 16, 46, .7);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 16px 30px -10px rgba(200, 16, 46, .8); }
.btn-ghost { background: #fff; color: var(--ink); border-color: var(--line); box-shadow: var(--sh-sm); }
.btn-ghost:hover { border-color: var(--c-red); color: var(--c-red); }
.menu-toggle { display: none; }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(1200px 600px at 80% -10%, rgba(200, 16, 46, .35), transparent 60%),
    radial-gradient(900px 500px at 0% 20%, rgba(30, 111, 184, .30), transparent 55%),
    linear-gradient(160deg, #081631 0%, #0B1F3A 45%, #0E1A33 100%);
  color: #fff;
  padding: 76px 0 120px;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, .04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .04) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: radial-gradient(900px 500px at 70% 10%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(900px 500px at 70% 10%, #000 30%, transparent 75%);
}
.hero .orb {
  position: absolute; border-radius: 50%; filter: blur(40px); opacity: .55;
  animation: float 14s ease-in-out infinite;
}
.hero .orb.a { width: 320px; height: 320px; background: rgba(200, 16, 46, .5); top: -60px; right: 8%; }
.hero .orb.b { width: 260px; height: 260px; background: rgba(30, 111, 184, .5); bottom: -40px; left: 4%; animation-delay: -5s; }
.hero .orb.c { width: 180px; height: 180px; background: rgba(200, 164, 92, .35); top: 40%; left: 46%; animation-delay: -9s; }

.hero .wrap { position: relative; z-index: 2; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 7px 16px; border-radius: 999px;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .18);
  font-size: 13px; letter-spacing: 1px; color: #EAF0FF;
  backdrop-filter: blur(6px);
}
.hero-badge .dot { width: 8px; height: 8px; border-radius: 50%; background: #43e08a; box-shadow: 0 0 0 4px rgba(67, 224, 138, .25); animation: pulse 2s infinite; }
.hero h1 {
  font-size: clamp(34px, 5.4vw, 60px); line-height: 1.12; margin: 22px 0 6px;
  font-weight: 800; letter-spacing: 1px;
}
.hero h1 .accent {
  background: linear-gradient(100deg, #FFD27A, var(--c-gold-soft) 40%, #FFB1C0 95%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .sub { font-size: clamp(15px, 1.6vw, 19px); color: #C7D2E8; max-width: 680px; }
.hero .creed {
  display: inline-flex; gap: 14px; margin-top: 18px; flex-wrap: wrap;
  font-size: 14px; color: #E7C98B; letter-spacing: 3px;
}
.hero .creed span { position: relative; }
.hero .creed span + span::before { content: "·"; position: absolute; left: -10px; color: #6E7E9C; }
.hero-cta { display: flex; gap: 14px; margin-top: 32px; flex-wrap: wrap; }
.hero-cta .btn-light {
  background: #fff; color: var(--c-navy); box-shadow: 0 16px 36px -14px rgba(0, 0, 0, .5);
}
.hero-cta .btn-light:hover { transform: translateY(-2px); }
.hero-cta .btn-line {
  background: rgba(255, 255, 255, .06); color: #fff; border: 1px solid rgba(255, 255, 255, .25);
  backdrop-filter: blur(6px);
}
.hero-cta .btn-line:hover { background: rgba(255, 255, 255, .14); }

/* 心跳线装饰 */
.heartbeat { position: absolute; left: 0; right: 0; bottom: 36px; height: 90px; z-index: 1; opacity: .5; }
.heartbeat svg { width: 100%; height: 100%; }
.heartbeat path { stroke: url(#hb); stroke-width: 2.4; fill: none; stroke-dasharray: 1400; stroke-dashoffset: 1400; animation: draw 5s linear infinite; }

/* ============================================================
   数据条
   ============================================================ */
.stats {
  position: relative; z-index: 3; margin-top: -64px;
}
.stats .grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--sh-lg); padding: 26px 28px;
}
.stat { text-align: center; position: relative; }
.stat + .stat::before {
  content: ""; position: absolute; left: -9px; top: 12%; height: 76%; width: 1px; background: var(--line);
}
.stat .num {
  font-family: var(--font-num); font-size: clamp(26px, 3.4vw, 40px); font-weight: 800;
  color: var(--c-navy); letter-spacing: .5px;
}
.stat .num .u { font-size: 16px; color: var(--c-red); margin-left: 2px; }
.stat .lab { font-size: 13.5px; color: var(--muted); margin-top: 4px; }
.stat .lab b { color: var(--c-red); font-weight: 700; }

/* ============================================================
   区块标题
   ============================================================ */
.section { padding: 72px 0; }
.section.head { padding-top: 8px; }
.sec-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; margin-bottom: 36px; flex-wrap: wrap; }
.sec-head .l { display: flex; align-items: center; gap: 16px; }
.sec-head .bar { width: 5px; height: 40px; border-radius: 4px; background: linear-gradient(var(--c-red), var(--c-gold)); }
.sec-head h2 { font-size: clamp(22px, 2.6vw, 30px); font-weight: 800; color: var(--ink); letter-spacing: .5px; }
.sec-head .en { font-size: 12px; letter-spacing: 3px; color: var(--muted-2); text-transform: uppercase; margin-top: 2px; }
.sec-head .desc { font-size: 14px; color: var(--muted); max-width: 520px; }

.chips { display: flex; gap: 10px; flex-wrap: wrap; }
.chip {
  font-size: 13px; padding: 8px 16px; border-radius: 999px; cursor: pointer;
  background: #fff; border: 1px solid var(--line); color: var(--muted);
  transition: .2s; user-select: none; font-weight: 500;
}
.chip:hover { border-color: var(--c-blue); color: var(--c-blue); }
.chip.active { background: var(--c-navy); color: #fff; border-color: var(--c-navy); }

/* ============================================================
   系统卡片网格
   ============================================================ */
.sys-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.scard {
  position: relative; background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px 24px 22px; overflow: hidden;
  box-shadow: var(--sh-sm); transition: transform .35s cubic-bezier(.2,.8,.2,1), box-shadow .35s, border-color .35s;
  opacity: 0; transform: translateY(26px);
}
.scard.show { opacity: 1; transform: none; }
.scard::before {
  content: ""; position: absolute; left: 0; top: 0; height: 4px; width: 100%;
  background: var(--accent, var(--c-blue));
  transform: scaleX(0); transform-origin: left; transition: transform .4s;
}
.scard::after {
  content: ""; position: absolute; right: -40px; top: -40px; width: 160px; height: 160px;
  background: radial-gradient(circle, var(--accent-soft, rgba(30,111,184,.18)), transparent 70%);
  opacity: 0; transition: opacity .4s; border-radius: 50%;
}
.scard:hover { transform: translateY(-8px); box-shadow: var(--sh-lg); border-color: transparent; }
.scard:hover::before { transform: scaleX(1); }
.scard:hover::after { opacity: 1; }

.scard .topline { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.scard .idx {
  font-family: var(--font-num); font-size: 13px; font-weight: 700; letter-spacing: 1px;
  color: var(--muted-2);
}
.scard .icon {
  width: 56px; height: 56px; border-radius: 15px; display: grid; place-items: center;
  background: var(--accent-soft, rgba(30,111,184,.12)); color: var(--accent, var(--c-blue));
  transition: .35s;
}
.scard .icon svg { width: 28px; height: 28px; }
.scard:hover .icon { background: var(--accent, var(--c-blue)); color: #fff; transform: rotate(-6deg) scale(1.05); box-shadow: 0 12px 26px -10px var(--accent, var(--c-blue)); }

.scard h3 { font-size: 19px; font-weight: 700; color: var(--ink); letter-spacing: .5px; }
.scard .en { font-size: 11.5px; letter-spacing: 2px; color: var(--muted-2); text-transform: uppercase; margin-top: 2px; }
.scard p { font-size: 13.5px; color: var(--muted); margin: 12px 0 14px; min-height: 44px; }
.scard .tags { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 18px; }
.scard .tags span {
  font-size: 11.5px; padding: 4px 10px; border-radius: 7px;
  background: var(--bg-2); color: var(--muted); border: 1px solid var(--line-soft);
}
.scard .enter {
  display: inline-flex; align-items: center; gap: 7px; font-size: 14px; font-weight: 600;
  color: var(--accent, var(--c-blue)); transition: gap .25s;
}
.scard .enter svg { width: 16px; height: 16px; transition: transform .25s; }
.scard:hover .enter svg { transform: translateX(4px); }

/* ============================================================
   特性区（三栏）
   ============================================================ */
.feats { background: linear-gradient(180deg, #fff, var(--bg)); border-top: 1px solid var(--line); }
.feat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.feat {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px 24px; box-shadow: var(--sh-sm); transition: .3s;
}
.feat:hover { transform: translateY(-6px); box-shadow: var(--sh-md); }
.feat .ic {
  width: 50px; height: 50px; border-radius: 13px; display: grid; place-items: center;
  background: linear-gradient(140deg, rgba(200,16,46,.12), rgba(200,164,92,.16)); color: var(--c-red);
  margin-bottom: 16px;
}
.feat .ic svg { width: 26px; height: 26px; }
.feat h4 { font-size: 17px; font-weight: 700; margin-bottom: 8px; }
.feat p { font-size: 13.5px; color: var(--muted); }

/* CTA 条 */
.cta-band {
  position: relative; overflow: hidden; margin: 0 0 0; border-radius: 22px;
  background: linear-gradient(135deg, var(--c-navy), var(--c-navy-2) 60%, #15264a);
  color: #fff; padding: 48px 44px; box-shadow: var(--sh-lg);
}
.cta-band::after {
  content: ""; position: absolute; right: -60px; top: -60px; width: 280px; height: 280px;
  background: radial-gradient(circle, rgba(200,16,46,.4), transparent 70%); border-radius: 50%;
}
.cta-band h3 { font-size: clamp(20px, 2.4vw, 28px); font-weight: 800; position: relative; z-index: 2; }
.cta-band p { color: #C7D2E8; margin: 10px 0 22px; max-width: 620px; position: relative; z-index: 2; }
.cta-band .btn-light { position: relative; z-index: 2; }

/* ============================================================
   页脚
   ============================================================ */
.footer { background: var(--c-navy); color: #B9C4DC; padding: 54px 0 28px; margin-top: 72px; }
.footer .top { display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 30px; }
.footer .fbrand .emblem {
  width: 44px; height: 44px; border-radius: 11px; display: grid; place-items: center;
  background: linear-gradient(140deg, var(--c-red), var(--c-red-700)); color: #fff; margin-bottom: 14px;
}
.footer .fbrand .emblem svg { width: 26px; height: 26px; }
.footer .fbrand b { color: #fff; font-size: 16px; }
.footer .fbrand p { font-size: 13px; margin-top: 10px; max-width: 320px; line-height: 1.7; }
.footer h5 { color: #fff; font-size: 14px; margin-bottom: 14px; letter-spacing: 1px; }
.footer ul { list-style: none; }
.footer ul li { font-size: 13px; padding: 5px 0; color: #97A4C2; transition: .2s; cursor: pointer; }
.footer ul li:hover { color: #fff; padding-left: 4px; }
.footer .bottom {
  border-top: 1px solid rgba(255,255,255,.1); margin-top: 34px; padding-top: 18px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; font-size: 12.5px; color: #7E8BAB;
}

/* ============================================================
   动画
   ============================================================ */
@keyframes float { 0%,100% { transform: translateY(0) } 50% { transform: translateY(-26px) } }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(67,224,138,.5) } 70% { box-shadow: 0 0 0 10px rgba(67,224,138,0) } 100% { box-shadow: 0 0 0 0 rgba(67,224,138,0) } }
@keyframes draw { to { stroke-dashoffset: 0 } }
@keyframes spin { to { transform: rotate(360deg) } }

/* 顶部进度条 */
.progress { position: fixed; top: 0; left: 0; height: 3px; width: 0; z-index: 100;
  background: linear-gradient(90deg, var(--c-red), var(--c-gold)); box-shadow: 0 0 10px rgba(200,16,46,.6); }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1024px) {
  .sys-grid, .feat-grid { grid-template-columns: repeat(2, 1fr); }
  .stats .grid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3)::before, .stat:nth-child(1)::before { display: none; }
  .footer .top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .topnav, .topbar .acts .btn-ghost { display: none; }
  .sys-grid, .feat-grid { grid-template-columns: 1fr; }
  .stats .grid { grid-template-columns: 1fr 1fr; padding: 18px; }
  .stat::before { display: none !important; }
  .hero { padding: 56px 0 100px; }
  .footer .top { grid-template-columns: 1fr; }
}