/* ==========================================================================
   青岛城市学院 · 青橙战队  —— 全站样式（深色科技风）
   ========================================================================== */

:root {
  --bg: #05070a;
  --bg-soft: #090d13;
  --panel: rgba(13, 19, 27, 0.78);
  --line: rgba(126, 166, 196, 0.16);
  --line-strong: rgba(126, 166, 196, 0.32);

  --cyan: #21d4e8;
  --cyan-dim: #0f7d8a;
  --orange: #ff7a18;
  --orange-dim: #b8500c;

  --text: #e9f1f8;
  --muted: #8ea3b6;
  --muted-2: #5f7488;

  --radius: 14px;
  --max: 1180px;
  --header-h: 68px;

  --font: "Inter", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* 背景：网格 + 双色光晕 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(60rem 40rem at 82% -10%, rgba(255, 122, 24, 0.16), transparent 65%),
    radial-gradient(50rem 36rem at 8% 8%, rgba(33, 212, 232, 0.13), transparent 62%),
    linear-gradient(180deg, #06080c 0%, #05070a 55%, #04060a 100%);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.5;
  background-image:
    linear-gradient(rgba(126, 166, 196, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(126, 166, 196, 0.055) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 78%);
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }

::selection { background: rgba(33, 212, 232, 0.28); }

/* ============================ 头部导航 ============================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background 0.25s ease, border-color 0.25s ease, backdrop-filter 0.25s ease;
}

.header.is-scrolled {
  background: rgba(5, 7, 10, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom-color: var(--line);
}

.header-inner {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  flex: none;
}

.brand-mark {
  width: 34px;
  height: 34px;
  flex: none;
}

.brand-text { display: flex; flex-direction: column; line-height: 1.15; }

.brand-name {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.brand-sub {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  color: var(--muted-2);
  text-transform: uppercase;
}

.nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav a {
  padding: 8px 13px;
  border-radius: 8px;
  font-size: 14.5px;
  color: var(--muted);
  transition: color 0.18s ease, background 0.18s ease;
}

.nav a:hover { color: var(--text); background: rgba(126, 166, 196, 0.08); }

.nav a.is-active { color: var(--text); }

.nav .nav-cta {
  margin-left: 8px;
  color: #0a0e14;
  font-weight: 600;
  background: linear-gradient(120deg, var(--cyan), #7ef0ff);
  box-shadow: 0 0 0 1px rgba(33, 212, 232, 0.4), 0 8px 24px -10px rgba(33, 212, 232, 0.8);
}

.nav .nav-cta:hover { color: #0a0e14; background: linear-gradient(120deg, #4ae3f4, #a6f7ff); }

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(13, 19, 27, 0.6);
  color: var(--text);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: currentColor;
  position: relative;
  transition: transform 0.2s ease;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 1.5px;
  background: currentColor;
  transition: transform 0.2s ease, top 0.2s ease;
}

.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

body.nav-open .nav-toggle span { transform: rotate(45deg); }
body.nav-open .nav-toggle span::before { top: 0; transform: rotate(-90deg); }
body.nav-open .nav-toggle span::after { top: 0; opacity: 0; }

/* ============================ Hero ============================ */

.hero {
  position: relative;
  min-height: 100vh;
  padding: calc(var(--header-h) + 64px) 24px 72px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-grid {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 56px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 26px;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(13, 19, 27, 0.6);
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--muted);
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 10px var(--orange);
}

.hero h1 {
  margin: 0;
  font-size: clamp(52px, 8.6vw, 104px);
  line-height: 1;
  letter-spacing: 0.02em;
  font-weight: 800;
  background: linear-gradient(105deg, #ffffff 8%, #cfe9f4 42%, var(--cyan) 72%, var(--orange) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-slogan {
  margin: 24px 0 0;
  font-size: clamp(19px, 2.4vw, 26px);
  letter-spacing: 0.42em;
  font-weight: 500;
  color: var(--text);
  text-indent: 0.42em;
}

.hero-desc {
  margin: 22px 0 0;
  max-width: 33em;
  color: var(--muted);
  font-size: 15.5px;
}

.hero-actions {
  margin-top: 38px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  height: 48px;
  padding: 0 24px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.btn-primary {
  color: #05070a;
  background: linear-gradient(120deg, var(--orange), #ffb15c);
  box-shadow: 0 12px 30px -14px rgba(255, 122, 24, 0.95);
}

.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 16px 36px -14px rgba(255, 122, 24, 1); }

.btn-ghost {
  color: var(--text);
  border-color: var(--line-strong);
  background: rgba(13, 19, 27, 0.55);
}

.btn-ghost:hover {
  transform: translateY(-2px);
  border-color: rgba(33, 212, 232, 0.55);
  box-shadow: 0 12px 30px -18px rgba(33, 212, 232, 0.9);
}

.hero-stats {
  margin: 52px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 40px;
  list-style: none;
  border-top: 1px solid var(--line);
  padding-top: 26px;
}

.hero-stats li { display: flex; flex-direction: column; gap: 2px; }

.hero-stats b {
  font-family: var(--mono);
  font-size: 27px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.02em;
}

.hero-stats span {
  font-size: 12.5px;
  color: var(--muted-2);
  letter-spacing: 0.14em;
}

/* Hero 右侧 HUD 图形 */
.hero-visual {
  position: relative;
  aspect-ratio: 1 / 1;
  display: grid;
  place-items: center;
}

.hero-visual::before {
  content: "";
  position: absolute;
  inset: 12%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(33, 212, 232, 0.12), transparent 68%);
  filter: blur(6px);
}

.hud { width: 100%; height: 100%; }

.hud .spin { transform-origin: 200px 200px; animation: spin 34s linear infinite; }
.hud .spin-rev { transform-origin: 200px 200px; animation: spin 52s linear infinite reverse; }
.hud .pulse { animation: pulse 3.4s ease-in-out infinite; }

@keyframes spin { to { transform: rotate(360deg); } }

@keyframes pulse {
  0%, 100% { opacity: 0.35; }
  50% { opacity: 1; }
}

/* ============================ 通用区块 ============================ */

.section {
  position: relative;
  padding: 104px 24px;
}

.section-inner {
  max-width: var(--max);
  margin: 0 auto;
}

.section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 22px;
  align-items: baseline;
  margin-bottom: 46px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.section-index {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.section-title {
  margin: 0;
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.section-desc {
  grid-column: 2;
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 15px;
}

/* ============================ 关于战队 ============================ */

.about-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 64px;
  align-items: start;
}

.about-lead {
  margin: 0;
  font-size: clamp(19px, 2.2vw, 24px);
  line-height: 1.75;
  color: var(--text);
  font-weight: 500;
}

.about-lead em {
  font-style: normal;
  color: var(--cyan);
}

.about-body p {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 15.5px;
}

.about-body p:last-child { margin-bottom: 0; }

.about-meta {
  margin-top: 34px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.about-meta div {
  padding: 18px 20px;
  background: var(--bg-soft);
}

.about-meta dt {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--muted-2);
  text-transform: uppercase;
}

.about-meta dd {
  margin: 6px 0 0;
  font-size: 15.5px;
  color: var(--text);
}

/* ============================ 三个组入口 ============================ */

.groups {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.group-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 30px 26px 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  overflow: hidden;
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.group-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent, var(--cyan)), transparent);
  opacity: 0.7;
  transition: opacity 0.22s ease;
}

.group-card::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent, var(--cyan)), transparent 66%);
  opacity: 0.1;
  transition: opacity 0.22s ease;
}

.group-card:hover {
  transform: translateY(-5px);
  border-color: rgba(126, 166, 196, 0.4);
  box-shadow: 0 26px 50px -34px rgba(0, 0, 0, 0.95);
}

.group-card:hover::before { opacity: 1; }
.group-card:hover::after { opacity: 0.2; }

.group-card.vision { --accent: #21d4e8; }
.group-card.hardware { --accent: #ff7a18; }
.group-card.ec { --accent: #9b8cff; }

.group-icon {
  width: 46px;
  height: 46px;
  margin-bottom: 22px;
  color: var(--accent);
}

.group-tag {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.18em;
  color: var(--muted-2);
  text-transform: uppercase;
}

.group-name {
  margin: 8px 0 0;
  font-size: 23px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.group-text {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14.5px;
  min-height: 3.4em;
}

.group-link {
  margin-top: 26px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--accent);
}

.group-link svg { transition: transform 0.2s ease; }
.group-card:hover .group-link svg { transform: translateX(4px); }

.group-status {
  position: absolute;
  top: 22px;
  right: 22px;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(5, 7, 10, 0.6);
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--muted-2);
}

/* ============================ 战队文化 ============================ */

.culture {
  position: relative;
  padding: 0 24px;
}

.culture-inner {
  position: relative;
  max-width: var(--max);
  margin: 0 auto;
  padding: 74px 40px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background:
    radial-gradient(40rem 20rem at 15% 0%, rgba(255, 122, 24, 0.16), transparent 62%),
    radial-gradient(36rem 18rem at 85% 100%, rgba(33, 212, 232, 0.14), transparent 62%),
    rgba(9, 13, 19, 0.85);
  overflow: hidden;
  text-align: center;
}

.culture-label {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.22em;
  color: var(--muted-2);
  text-transform: uppercase;
}

.culture-slogan {
  margin: 20px 0 0;
  font-size: clamp(32px, 5.6vw, 66px);
  font-weight: 800;
  letter-spacing: 0.14em;
  line-height: 1.3;
  background: linear-gradient(100deg, var(--orange) 10%, #ffd39a 48%, var(--cyan) 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.culture-note {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 14.5px;
}

/* ============================ 参赛记录 ============================ */

.timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 30px;
  list-style: none;
  border-left: 1px solid var(--line);
}

.timeline li {
  position: relative;
  padding: 0 0 38px;
}

.timeline li:last-child { padding-bottom: 0; }

.timeline li::before {
  content: "";
  position: absolute;
  left: -36px;
  top: 8px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 2px solid var(--cyan);
  background: var(--bg);
  box-shadow: 0 0 12px rgba(33, 212, 232, 0.8);
}

.timeline li.current::before {
  border-color: var(--orange);
  box-shadow: 0 0 14px rgba(255, 122, 24, 0.9);
}

.tl-year {
  font-family: var(--mono);
  font-size: 19px;
  letter-spacing: 0.08em;
  color: var(--text);
}

.tl-year .badge {
  margin-left: 10px;
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid rgba(255, 122, 24, 0.5);
  background: rgba(255, 122, 24, 0.1);
  color: var(--orange);
  font-size: 10px;
  letter-spacing: 0.12em;
  vertical-align: middle;
}

.tl-events {
  margin: 8px 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tl-events li {
  padding: 5px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(13, 19, 27, 0.7);
  font-size: 13.5px;
  color: var(--muted);
}

/* ============================ 获奖记录 ============================ */

.awards-wrap {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--panel);
}

.awards {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}

.awards thead th {
  padding: 15px 22px;
  text-align: left;
  font-weight: 500;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted-2);
  background: rgba(126, 166, 196, 0.06);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

.awards tbody td {
  padding: 15px 22px;
  border-bottom: 1px solid rgba(126, 166, 196, 0.09);
  color: var(--muted);
  vertical-align: middle;
}

.awards tbody tr:last-child td { border-bottom: none; }
.awards tbody tr:hover td { background: rgba(33, 212, 232, 0.045); color: var(--text); }

.awards .col-season {
  font-family: var(--mono);
  color: var(--text);
  width: 96px;
}

.awards .col-award { color: var(--text); }

.level {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12.5px;
  border: 1px solid var(--line-strong);
  white-space: nowrap;
}

.level-1 { color: #ffd166; border-color: rgba(255, 209, 102, 0.45); background: rgba(255, 209, 102, 0.08); }
.level-2 { color: var(--cyan); border-color: rgba(33, 212, 232, 0.42); background: rgba(33, 212, 232, 0.08); }
.level-3 { color: #c9b8a8; border-color: rgba(201, 184, 168, 0.3); background: rgba(201, 184, 168, 0.06); }

/* ============================ 页脚 ============================ */

.footer {
  border-top: 1px solid var(--line);
  padding: 46px 24px 34px;
  margin-top: 20px;
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 24px 40px;
  align-items: center;
  justify-content: space-between;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-brand .brand-mark { width: 30px; height: 30px; }

.footer-brand strong {
  display: block;
  font-size: 14.5px;
  letter-spacing: 0.06em;
}

.footer-brand span {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  color: var(--muted-2);
}

.footer-links {
  display: flex;
  gap: 20px;
  font-size: 14px;
  color: var(--muted);
}

.footer-links a:hover { color: var(--text); }

.footer-copy {
  width: 100%;
  margin: 0;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-size: 12.5px;
  color: var(--muted-2);
  letter-spacing: 0.04em;
}

/* ============================ 子页面（占位） ============================ */

.page-hero {
  padding: calc(var(--header-h) + 80px) 24px 56px;
  border-bottom: 1px solid var(--line);
}

.page-hero-inner {
  max-width: var(--max);
  margin: 0 auto;
}

.crumb {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted-2);
}

.crumb:hover { color: var(--cyan); }

.page-title {
  margin: 22px 0 0;
  font-size: clamp(34px, 6vw, 60px);
  font-weight: 800;
  letter-spacing: 0.04em;
}

.page-lead {
  margin: 16px 0 0;
  max-width: 40em;
  color: var(--muted);
  font-size: 15.5px;
}

.page-body {
  padding: 64px 24px 96px;
}

.page-body-inner {
  max-width: var(--max);
  margin: 0 auto;
}

.placeholder {
  position: relative;
  padding: 64px 32px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(13, 19, 27, 0.7), rgba(9, 13, 19, 0.5));
  text-align: center;
}

.placeholder-icon {
  width: 44px;
  height: 44px;
  margin: 0 auto 20px;
  color: var(--muted-2);
}

.placeholder h2 {
  margin: 0;
  font-size: 20px;
  letter-spacing: 0.06em;
}

.placeholder p {
  margin: 12px auto 0;
  max-width: 34em;
  color: var(--muted);
  font-size: 14.5px;
}

.placeholder .mono {
  display: inline-block;
  margin-top: 18px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--muted-2);
}

/* ============================ 动画 ============================ */

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s cubic-bezier(0.22, 0.61, 0.36, 1), transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .hud .spin, .hud .spin-rev, .hud .pulse { animation: none; }
}

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

@media (max-width: 980px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 40px; }
  .hero-visual { max-width: 420px; margin: 0 auto; width: 100%; order: 2; }
  .hero { min-height: auto; padding-top: calc(var(--header-h) + 96px); }
  .about-grid { grid-template-columns: minmax(0, 1fr); gap: 36px; }
  .groups { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  .nav-toggle { display: flex; }

  .nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 14px 20px 22px;
    background: rgba(5, 7, 10, 0.97);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(14px);
  }

  body.nav-open .nav { display: flex; }

  .nav a { padding: 13px 12px; font-size: 16px; }
  .nav .nav-cta { margin: 8px 0 0; text-align: center; }

  .section { padding: 76px 20px; }
  .section-head { grid-template-columns: minmax(0, 1fr); gap: 10px; }
  .section-desc { grid-column: 1; }

  .groups { grid-template-columns: minmax(0, 1fr); }
  .group-text { min-height: 0; }

  .culture { padding: 0 20px; }
  .culture-inner { padding: 54px 24px; border-radius: 16px; }

  .timeline { padding-left: 24px; }
  .timeline li::before { left: -30px; }

  .awards-wrap { overflow-x: auto; }
  .awards { min-width: 620px; }

  .hero-stats { gap: 18px 30px; }

  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 420px) {
  .hero h1 { font-size: 44px; }
  .hero-slogan { letter-spacing: 0.28em; font-size: 17px; }
  .about-meta { grid-template-columns: minmax(0, 1fr); }
}

/* ============================ 品牌 logo（2026-10-26 替换） ============================ */
.brand-logo {
  height: 40px;
  width: auto;
  display: block;
  flex: none;
}
.footer-brand .brand-logo-sm {
  width: 48px;
  height: 48px;
  flex: none;
  border-radius: 50%;
}
@media (max-width: 768px) {
  .brand-logo { height: 32px; }
  .footer-brand .brand-logo-sm { width: 40px; height: 40px; }
}