/* ============================================================
   信达助康官网 · 晴空数据流 (Bright Data Flow · 白蓝明亮主题)
   纯静态 / 零依赖 / 移动优先
   深色锚点：仿真调度看板（产品大屏）、页脚
   ============================================================ */

:root {
  --bg: #F5F8FC;
  --bg-2: #FFFFFF;
  --tint: #EAF1F9;
  --line: #D8E3F2;
  --navy: #0B1B33;
  --blue: #1F5EE3;
  --cyan: #0C7187;
  --mint: #10A26F;
  --amber: #DA7A0B;
  --fg: #16283F;
  --muted: #52688A;

  --grad-a: #0A8CAD;
  --grad-b: #1F5EE3;

  --shadow-panel: 0 1px 2px rgba(15, 42, 90, .04), 0 10px 30px rgba(15, 42, 90, .06);
  --shadow-hover: 0 4px 10px rgba(15, 42, 90, .06), 0 16px 40px rgba(31, 94, 227, .12);

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
               "Source Han Sans SC", "Noto Sans SC", sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Cascadia Code",
               ui-monospace, Menlo, Consolas, monospace;

  --container: 1200px;
  --nav-h: 68px;
  --radius: 10px;
}

/* ---------- Reset 补充 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  scroll-padding-top: calc(var(--nav-h) + 16px);
}
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body.menu-open { overflow: hidden; }
h1, h2, h3, h4, p, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
img, svg, canvas { max-width: 100%; display: block; }
button { font: inherit; background: none; border: none; cursor: pointer; color: inherit; }

:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection { background: rgba(31, 94, 227, .18); }

.skip-link {
  position: absolute;
  left: 16px; top: -48px;
  z-index: 100;
  padding: 8px 16px;
  background: var(--blue);
  color: #fff;
  font-weight: 600;
  border-radius: 0 0 8px 8px;
  transition: top .2s;
}
.skip-link:focus { top: 0; }

.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 24px;
}

/* ---------- 全站背景粒子画布 ---------- */
#bgStars {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.nav, main, .footer { position: relative; z-index: 1; }

/* ---------- 通用文字部件 ---------- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .32em;
  text-transform: uppercase;
  color: var(--cyan);
  display: flex;
  align-items: center;
  gap: 12px;
}
.eyebrow::before {
  content: "";
  width: 28px; height: 1px;
  background: linear-gradient(90deg, var(--cyan), transparent);
  flex: none;
}
.grad {
  background: linear-gradient(100deg, var(--grad-a) 10%, var(--grad-b) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .04em;
  transition: transform .25s, box-shadow .25s, border-color .25s, color .25s, background .25s;
}
.btn-primary {
  /* 按钮不用青色渐变端：白字在青色上对比度不足，改用蓝→深蓝 */
  background: linear-gradient(135deg, var(--blue), #1946C8);
  color: #fff;
  box-shadow: 0 4px 16px rgba(31, 94, 227, .28);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(31, 94, 227, .4);
}
.btn-ghost {
  border: 1px solid #C4D4EA;
  color: var(--fg);
  background: rgba(255, 255, 255, .6);
}
.btn-ghost:hover {
  border-color: var(--blue);
  color: var(--blue);
  transform: translateY(-2px);
}
.btn-sm { padding: 9px 20px; font-size: 14px; }

.cta-row { display: flex; flex-wrap: wrap; gap: 14px; }

/* ---------- 面板（HUD 角标） ---------- */
.panel {
  position: relative;
  background: var(--bg-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-panel);
}
/* HUD 角标：只保留在「系统面板」上（两端协同、调度看板），不做通用卡片装饰 */
.duo::before, .duo::after,
.console::before, .console::after {
  content: "";
  position: absolute;
  width: 14px; height: 14px;
  pointer-events: none;
}
.duo::before, .console::before {
  top: -1px; left: -1px;
  border-top: 1.5px solid rgba(31, 94, 227, .6);
  border-left: 1.5px solid rgba(31, 94, 227, .6);
}
.duo::after, .console::after {
  bottom: -1px; right: -1px;
  border-bottom: 1.5px solid rgba(31, 94, 227, .6);
  border-right: 1.5px solid rgba(31, 94, 227, .6);
}

/* ---------- 导航 ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  height: var(--nav-h);
  transition: background .3s, border-color .3s, box-shadow .3s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(255, 255, 255, .85);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
  box-shadow: 0 2px 16px rgba(15, 42, 90, .05);
}
.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  color: var(--navy);
}
.brand-logo {
  width: 34px; height: 34px;
  align-self: center;
  border-radius: 8px;
}
.brand-cn { font-size: 19px; font-weight: 700; letter-spacing: .06em; }
.brand-en {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .3em;
  color: var(--muted);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a:not(.btn) {
  font-size: 15px;
  color: var(--muted);
  transition: color .2s;
  padding: 6px 0;
}
.nav-links a:not(.btn):hover { color: var(--blue); }

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px; height: 44px;
  padding: 10px;
}
.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: transform .3s, opacity .3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: var(--nav-h);
  background:
    radial-gradient(900px 620px at 78% 18%, rgba(31, 94, 227, .09), transparent 62%),
    radial-gradient(720px 540px at 12% 85%, rgba(10, 140, 173, .07), transparent 62%);
}
/* HUD 网格纹理 */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(31, 94, 227, .05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 94, 227, .05) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(ellipse 90% 80% at 60% 45%, #000 30%, transparent 75%);
  mask-image: radial-gradient(ellipse 90% 80% at 60% 45%, #000 30%, transparent 75%);
  pointer-events: none;
}
#heroNet {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.hero-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  padding-block: 56px;
}
.hero h1 {
  margin-top: 26px;
  font-size: clamp(38px, 6vw, 66px);
  font-weight: 300; /* 小尺寸下 200 发虚，大屏由下方媒体查询降回 200 */
  line-height: 1.25;
  letter-spacing: .02em;
  color: var(--navy);
}
.hero h1 .grad {
  font-weight: 800;
  letter-spacing: .04em;
}
.lede {
  margin-top: 22px;
  max-width: 560px;
  font-size: clamp(15px, 1.6vw, 17px);
  color: var(--muted);
}
.hero .cta-row { margin-top: 36px; }

.hero-scroll {
  position: absolute;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .4em;
  color: var(--muted);
  margin: 0;
}
.hero-scroll-line {
  width: 1px; height: 34px;
  background: linear-gradient(180deg, var(--blue), transparent);
  animation: scrollPulse 2.2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { transform: scaleY(.4); opacity: .4; transform-origin: top; }
  50% { transform: scaleY(1); opacity: 1; transform-origin: top; }
}

/* ---------- 实时任务流 ticker ---------- */
.ticker {
  margin-top: 52px;
  max-width: 520px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .78);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-panel);
  padding: 14px 18px 10px;
}
.ticker-title {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .3em;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}
.ticker-demo {
  font-size: 10px;
  letter-spacing: .2em;
  color: var(--muted);
  background: var(--tint);
  padding: 1px 7px;
  border-radius: 99px;
}
#tickerList { display: flex; flex-direction: column; }
.tk {
  display: grid;
  grid-template-columns: 52px 58px 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 9px 0;
  font-size: 13px;
  border-bottom: 1px dashed var(--line);
  animation: tkIn .45s ease both;
}
.tk:last-child { border-bottom: none; }
@keyframes tkIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: none; }
}
.tk-id {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
}
.tk-status {
  font-size: 11px;
  text-align: center;
  padding: 2px 0;
  border-radius: 4px;
  letter-spacing: .08em;
}
.s-wait .tk-status { color: #1946C8;      background: rgba(31, 94, 227, .1); }
.s-run  .tk-status { color: #8F430F;      background: rgba(218, 122, 11, .12); }
.s-done .tk-status { color: #067A57;      background: rgba(16, 162, 111, .12); }
.tk-route { color: var(--fg); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.tk-type {
  font-size: 11px;
  color: var(--muted);
  font-family: var(--font-mono);
}

/* ---------- 数据带 ---------- */
.stats {
  border-block: 1px solid var(--line);
  background: var(--tint);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  padding-block: 44px;
}
.stat {
  position: relative;
  padding-top: 16px;
}
.stat::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 34px; height: 2px;
  background: linear-gradient(90deg, var(--blue), transparent);
}
.stat-num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 3.4vw, 42px);
  font-weight: 700;
  color: var(--navy);
  line-height: 1.2;
  display: block;
}
.stat-label {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  color: var(--muted);
}
.stat-label i {
  display: block;
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--muted);
  margin-top: 3px;
}
.stat-placeholder .stat-num {
  color: var(--muted);
  border-bottom: 1px dashed rgba(82, 104, 138, .5);
  display: inline-block;
}

/* ---------- 分区通用 ---------- */
.section { padding-block: clamp(76px, 10vw, 128px); }
.section-tight { padding-top: 0; }
.section-head { max-width: 720px; margin-bottom: clamp(40px, 5vw, 64px); }
.section-head h2 {
  margin-top: 20px;
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 300;
  line-height: 1.35;
  letter-spacing: .02em;
  color: var(--navy);
}
.section-head h2 strong { font-weight: 800; }
.section-lede {
  margin-top: 16px;
  color: var(--muted);
  font-size: 15.5px;
  max-width: 620px;
}

/* ---------- 痛点对照 ---------- */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.cmp { padding: 34px 34px 26px; }
.cmp-title {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .05em;
  margin-bottom: 20px;
  color: var(--navy);
}
.cmp li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding-block: 11px;
  font-size: 15px;
  border-top: 1px dashed var(--line);
}
.mark {
  flex: none;
  width: 20px; height: 20px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  margin-top: 3px;
}
.mark-x { color: var(--muted); border: 1px solid #C4D4EA; }
.mark-ok { color: #fff; background: var(--mint); font-weight: 700; }
.cmp-old { background: #F3F6FB; box-shadow: none; }
.cmp-old .cmp-title { color: var(--muted); }
.cmp-old li { color: var(--muted); }
.cmp-new { border-color: rgba(31, 94, 227, .45); box-shadow: var(--shadow-hover); }
.cmp-new .cmp-title { color: var(--blue); }

/* ---------- 两端协同 ---------- */
.duo {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 28px;
  align-items: center;
  padding: 38px 42px;
  margin-bottom: 56px;
}
.duo-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--cyan);
  margin-bottom: 16px;
}
.duo-side li {
  padding-block: 8px;
  font-size: 15px;
  color: var(--fg);
  border-top: 1px dashed var(--line);
  padding-left: 16px;
  position: relative;
}
.duo-side li::before {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  width: 6px; height: 1.5px;
  background: var(--blue);
}
.duo-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .28em;
  color: #067A57;
  writing-mode: vertical-rl;
  padding-inline: 8px;
}
.duo-sync { writing-mode: vertical-rl; }
.duo-line {
  width: 1px;
  height: 44px;
  background-image: linear-gradient(180deg, var(--mint) 45%, transparent 45%);
  background-size: 1px 8px;
  animation: syncFlow 1.4s linear infinite;
}
@keyframes syncFlow {
  from { background-position-y: 0; }
  to { background-position-y: 8px; }
}

/* ---------- 功能网格 ---------- */
.feature-grid,
.sec-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.sec-grid { grid-template-columns: repeat(3, 1fr); }
.feature {
  padding: 26px 24px;
  transition: transform .3s, border-color .3s, box-shadow .3s;
}
.feature:hover {
  transform: translateY(-4px);
  border-color: rgba(31, 94, 227, .5);
  box-shadow: var(--shadow-hover);
}
.feature-icon {
  width: 30px; height: 30px;
  stroke: var(--blue);
  stroke-width: 1.5;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  margin-bottom: 18px;
}
.feature h3 {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--navy);
}
.feature p {
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 生命周期 stepper ---------- */
.lifecycle { margin-top: 64px; }
.lifecycle-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .3em;
  color: var(--muted);
  text-align: center;
  margin-bottom: 36px;
}
.steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  position: relative;
}
.steps::before {
  content: "";
  position: absolute;
  top: 7px;
  left: 12.5%;
  right: 12.5%;
  height: 1px;
  background: linear-gradient(90deg, var(--blue), var(--cyan), var(--amber), var(--mint));
  opacity: .5;
}
.step {
  text-align: center;
  position: relative;
  padding-top: 30px;
}
.step-dot {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 15px; height: 15px;
  border-radius: 50%;
  border: 2px solid;
  background: var(--bg);
}
.st-wait  .step-dot { border-color: var(--blue);  box-shadow: 0 0 12px rgba(31, 94, 227, .35); }
.st-check .step-dot { border-color: var(--cyan);  box-shadow: 0 0 12px rgba(8, 145, 178, .35); }
.st-run   .step-dot { border-color: var(--amber); box-shadow: 0 0 12px rgba(217, 119, 6, .35); }
.st-done  .step-dot { border-color: var(--mint);  box-shadow: 0 0 12px rgba(14, 159, 110, .35); background: var(--mint); }
.step h4 { font-size: 16px; font-weight: 700; letter-spacing: .06em; color: var(--navy); }
.step p {
  margin-top: 6px;
  font-size: 12.5px;
  color: var(--muted);
}

/* ---------- 仿真调度看板（刻意保留的深色锚点：产品大屏） ---------- */
.console {
  max-width: 860px;
  margin-inline: auto;
  padding: 0 0 8px;
  background: linear-gradient(180deg, #0C1626, #0A1220);
  border-color: #1C2A44;
  box-shadow: 0 24px 60px rgba(11, 27, 51, .35);
}
.console::before {
  border-top-color: rgba(34, 211, 238, .8);
  border-left-color: rgba(34, 211, 238, .8);
}
.console::after {
  border-bottom-color: rgba(34, 211, 238, .8);
  border-right-color: rgba(34, 211, 238, .8);
}
.console-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 26px;
  border-bottom: 1px solid #1C2A44;
  background: rgba(255, 255, 255, .03);
  border-radius: calc(var(--radius) - 1px) calc(var(--radius) - 1px) 0 0;
}
.console-title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .26em;
  color: #22D3EE;
}
.console-clock {
  font-family: var(--font-mono);
  font-size: 13px;
  color: #8A9BB8;
}
.console-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid #1C2A44;
}
.cstat {
  padding: 20px 26px;
  border-right: 1px solid #1C2A44;
}
.cstat:last-child { border-right: none; }
.cstat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.2;
}
.c-wait .cstat-num { color: #60A5FA; }
.c-run  .cstat-num { color: #F5B301; }
.c-done .cstat-num { color: #34E0A1; }
.cstat-label { font-size: 12.5px; color: #8A9BB8; }

.console-list { padding: 6px 26px; }
.db-row {
  display: grid;
  grid-template-columns: 64px 1fr auto 56px;
  align-items: center;
  gap: 16px;
  padding: 13px 0;
  font-size: 14px;
  color: #E6EDF7;
  border-bottom: 1px dashed rgba(28, 42, 68, .8);
  transition: background .3s;
}
.db-row:last-child { border-bottom: none; }
.db-status {
  font-size: 11.5px;
  text-align: center;
  padding: 3px 0;
  border-radius: 4px;
  letter-spacing: .08em;
}
.db-row.s-wait .db-status { color: #60A5FA; background: rgba(59, 130, 246, .14); }
.db-row.s-run  .db-status { color: #F5B301; background: rgba(245, 179, 1, .12); }
.db-row.s-done .db-status { color: #34E0A1; background: rgba(52, 224, 161, .12); }
.db-route { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.db-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: #8A9BB8;
  border: 1px solid #1C2A44;
  padding: 2px 8px;
  border-radius: 99px;
}
.db-timer {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: #8A9BB8;
  text-align: right;
}
.db-row.s-run .db-timer { color: #F5B301; }
.console-note {
  padding: 12px 26px 10px;
  font-size: 11.5px;
  color: #8A9BB8;
}

/* ---------- 合作医院 ---------- */
.hosp-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
.hosp {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 24px 26px;
  transition: transform .3s, border-color .3s, box-shadow .3s;
}
.hosp:hover {
  transform: translateY(-3px);
  border-color: rgba(31, 94, 227, .5);
  box-shadow: inset 3px 0 0 var(--blue), var(--shadow-hover);
}
.hosp-name { font-size: 17px; font-weight: 600; letter-spacing: .04em; color: var(--navy); }
.hosp-more {
  border-style: dashed;
  background: transparent;
  box-shadow: none;
}
.hosp-more:hover { box-shadow: none; border-color: rgba(31, 94, 227, .4); }
.hosp-more .hosp-name { font-weight: 500; color: var(--muted); }
.hosp-region {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--muted);
  white-space: nowrap;
}

/* ---------- 关于 + 联系 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 40px;
  align-items: start;
}
.about-text p {
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.9;
}
.about-text p + p { margin-top: 16px; }
.contact {
  padding: 32px 34px;
}
.contact-mail {
  display: inline-block;
  margin-block: 18px 26px;
  font-family: var(--font-mono);
  font-size: clamp(17px, 2vw, 21px);
  color: var(--navy);
  border-bottom: 1px solid #C4D4EA;
  padding-bottom: 4px;
  transition: color .2s, border-color .2s;
}
.contact-mail:hover { color: var(--blue); border-color: var(--blue); }

/* ---------- 页脚（深色锚点） ---------- */
.footer {
  background: var(--navy);
  color: #C9D6EA;
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 28px;
  padding-block: 44px 30px;
}
.footer-brand {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .08em;
  color: #fff;
}
.footer-brand span {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .3em;
  color: #8FA5C6;
  margin-left: 8px;
}
.footer-slogan {
  margin-top: 8px;
  font-size: 13px;
  color: #8FA5C6;
  letter-spacing: .1em;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  font-size: 13.5px;
}
.footer-links a { color: #8FA5C6; transition: color .2s; }
.footer-links a:hover { color: #7CC5F5; }
.footer-legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  padding-block: 18px 26px;
  border-top: 1px solid rgba(255, 255, 255, .12);
  font-size: 12.5px;
  color: #8FA5C6;
}
.footer-legal a {
  color: #8FA5C6;
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color .2s;
}
.footer-legal a:hover { color: #7CC5F5; }

/* ---------- 滚动揭示动画 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .7s cubic-bezier(.22, .8, .3, 1), transform .7s cubic-bezier(.22, .8, .3, 1);
  transition-delay: var(--d, 0s);
}
.js [data-reveal].revealed {
  opacity: 1;
  transform: none;
}

/* ---------- 减弱动态偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .js [data-reveal] { opacity: 1; transform: none; }
}

/* ============================================================
   响应式
   ============================================================ */

@media (min-width: 1025px) {
  .hero h1, .section-head h2 { font-weight: 200; }
}

@media (max-width: 420px) {
  .brand-en { display: none; } /* 320px 视口下品牌不换行 */
}

@media (max-width: 1024px) {
  .feature-grid, .sec-grid { grid-template-columns: repeat(2, 1fr); }
  .hosp-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 34px 24px; }
  .about-grid { grid-template-columns: 1fr; }
  .duo { grid-template-columns: 1fr; gap: 8px; padding: 30px 28px; }
  .duo-link {
    writing-mode: horizontal-tb;
    flex-direction: row;
    padding-block: 14px;
  }
  .duo-sync { writing-mode: horizontal-tb; letter-spacing: .28em; }
  .duo-line {
    width: 44px; height: 1px;
    background-image: linear-gradient(90deg, var(--mint) 45%, transparent 45%);
    background-size: 8px 1px;
    animation-name: syncFlowX;
  }
}
@keyframes syncFlowX {
  from { background-position-x: 0; }
  to { background-position-x: 8px; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed;
    inset: var(--nav-h) 0 0 0;
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    gap: 4px;
    padding: 28px 24px;
    background: rgba(245, 248, 252, .97);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    transform: translateX(100%);
    visibility: hidden; /* 关闭时移出 Tab 焦点链 */
    transition: transform .35s cubic-bezier(.22, .8, .3, 1), visibility 0s .35s;
    border-top: 1px solid var(--line);
  }
  .nav-links.open {
    transform: none;
    visibility: visible;
    transition: transform .35s cubic-bezier(.22, .8, .3, 1), visibility 0s 0s;
  }
  .nav-links a:not(.btn) {
    font-size: 19px;
    padding: 14px 0;
    width: 100%;
    border-bottom: 1px dashed var(--line);
  }
  .nav-links .btn { margin-top: 22px; width: 100%; }
  .nav {
    background: rgba(255, 255, 255, .88);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    border-bottom-color: var(--line);
  }

  .compare-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; gap: 26px; }
  .steps::before {
    left: 7px; right: auto;
    top: 8px; bottom: 8px;
    width: 1px; height: auto;
    background: linear-gradient(180deg, var(--blue), var(--cyan), var(--amber), var(--mint));
  }
  .step { text-align: left; padding-top: 0; padding-left: 32px; }
  .step-dot { left: 0; top: 5px; transform: none; }

  .console-stats { grid-template-columns: repeat(3, 1fr); }
  .cstat { padding: 14px 16px; }
  .cstat-num { font-size: 22px; }
  .console-head, .console-list, .console-note { padding-inline: 18px; }
  .db-row { grid-template-columns: 58px 1fr auto; }
  .db-timer { display: none; }

  .br-lg { display: none; }
  .hero-scroll { display: none; }
}

@media (max-width: 640px) {
  .feature-grid, .sec-grid, .hosp-grid, .stats-grid { grid-template-columns: 1fr; }
  .stats-grid { gap: 26px; }
  .cmp { padding: 26px 22px 20px; }
  .tk { grid-template-columns: 58px 1fr auto; }
  .tk-id { display: none; }
  .hero .cta-row .btn { flex: 1; }
  .contact { padding: 26px 22px; }
  .container { padding-inline: 20px; }
}