/* =================================================================
   五方协同 · 企业官网样式
   方向：编辑式企业风（Swiss-influenced editorial），蓝×红品牌色，浅色有层次
   ================================================================= */

/* ---------- Design Tokens ---------- */
:root {
  /* 品牌色（取自 logo：深蓝主体 + 红色流向） */
  --brand-blue: oklch(45% 0.13 252);
  --brand-blue-deep: oklch(34% 0.11 254);
  --brand-blue-soft: oklch(96% 0.02 252);
  --brand-red: oklch(58% 0.21 27);
  --brand-red-soft: oklch(96% 0.03 27);

  /* 中性色 */
  --color-surface: oklch(99% 0.004 252);
  --color-surface-2: oklch(97% 0.006 252);
  --color-ink: oklch(22% 0.02 252);
  --color-ink-soft: oklch(44% 0.02 252);
  --color-line: oklch(90% 0.01 252);
  --color-line-strong: oklch(82% 0.015 252);

  /* 字号（流体） */
  --text-xs: clamp(0.75rem, 0.72rem + 0.1vw, 0.8rem);
  --text-sm: clamp(0.85rem, 0.82rem + 0.15vw, 0.92rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.075rem);
  --text-lg: clamp(1.15rem, 1.05rem + 0.5vw, 1.4rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.4vw, 2.1rem);
  --text-2xl: clamp(2rem, 1.4rem + 2.8vw, 3.4rem);
  --text-hero: clamp(2.6rem, 1.4rem + 5.4vw, 5.6rem);

  /* 间距 */
  --space-section: clamp(4.5rem, 3rem + 6vw, 9rem);
  --shell: min(1180px, 92vw);

  /* 圆角 / 阴影 / 动效 */
  --radius: 4px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px oklch(40% 0.05 252 / 0.06), 0 2px 8px oklch(40% 0.05 252 / 0.05);
  --shadow-md: 0 10px 30px oklch(40% 0.08 252 / 0.10), 0 2px 6px oklch(40% 0.05 252 / 0.06);
  --shadow-lg: 0 24px 60px oklch(40% 0.1 252 / 0.16);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --dur: 320ms;

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --font-serif: "Songti SC", "Noto Serif SC", Georgia, serif;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
html, body { overflow-x: hidden; }
body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.7;
  color: var(--color-ink);
  background: var(--color-surface);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; padding: 0; }
h1, h2, h3, h4 { line-height: 1.18; font-weight: 700; letter-spacing: -0.01em; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: 1rem; top: -3rem; z-index: 200;
  background: var(--brand-blue); color: #fff; padding: 0.5rem 1rem; border-radius: var(--radius);
  transition: top var(--dur) var(--ease);
}
.skip-link:focus { top: 1rem; }

.shell { width: var(--shell); margin-inline: auto; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: oklch(99% 0.004 252 / 0.82);
  backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.site-header[data-scrolled] {
  border-bottom-color: var(--color-line);
  box-shadow: var(--shadow-sm);
}
.site-header__inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 72px; gap: 1.5rem;
}
.brand { display: inline-flex; align-items: center; gap: 0.7rem; }
.brand__mark { width: 40px; height: 40px; }
.brand__text { display: flex; flex-direction: column; line-height: 1.05; }
.brand__text strong { font-size: 1.15rem; letter-spacing: 0.04em; }
.brand__text em {
  font-style: normal; font-size: 0.62rem; letter-spacing: 0.32em;
  color: var(--color-ink-soft);
}

/* Nav */
.nav__list { display: flex; align-items: center; gap: 0.4rem; }
.nav__list > li > a {
  display: inline-block; padding: 0.55rem 0.95rem; font-size: var(--text-sm);
  color: var(--color-ink-soft); border-radius: var(--radius);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.nav__list > li > a:hover { color: var(--color-ink); background: var(--brand-blue-soft); }
.nav__list > li > a.is-active { color: var(--brand-blue); font-weight: 600; }
.nav__cta {
  background: var(--brand-blue); color: #fff !important;
  padding: 0.6rem 1.25rem !important; border-radius: 999px !important;
  box-shadow: var(--shadow-sm);
}
.nav__cta:hover { background: var(--brand-blue-deep) !important; transform: translateY(-1px); }
.nav__toggle {
  display: none; flex-direction: column; gap: 5px; width: 44px; height: 44px;
  align-items: center; justify-content: center; background: none; border: 0; cursor: pointer;
}
.nav__toggle span:not(.sr-only) {
  width: 22px; height: 2px; background: var(--color-ink); border-radius: 2px;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.85rem 1.7rem; border-radius: 999px; font-weight: 600; font-size: var(--text-sm);
  border: 1px solid transparent; cursor: pointer;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.btn--primary { background: var(--brand-blue); color: #fff; box-shadow: var(--shadow-sm); }
.btn--primary:hover { background: var(--brand-blue-deep); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn--ghost { background: transparent; color: var(--brand-blue); border-color: var(--color-line-strong); }
.btn--ghost:hover { border-color: var(--brand-blue); background: var(--brand-blue-soft); }
.btn--lg { padding: 1rem 2rem; font-size: var(--text-base); }

/* ---------- Reveal motion ---------- */
[data-reveal] {
  opacity: 0; transform: translateY(22px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
[data-reveal].is-in { opacity: 1; transform: none; }

/* ---------- Section scaffolding ---------- */
.section { padding-block: var(--space-section); }
.section--tint { background: var(--color-surface-2); }
.eyebrow {
  display: inline-flex; align-items: center; gap: 0.55rem;
  font-size: var(--text-xs); letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--brand-red); font-weight: 700;
}
.eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--brand-red); }
.section__head { max-width: 56ch; margin-bottom: clamp(2rem, 1rem + 3vw, 3.5rem); }
.section__head h2 { font-size: var(--text-2xl); margin-top: 0.9rem; }
.section__head p { color: var(--color-ink-soft); font-size: var(--text-lg); margin-top: 1rem; }

/* =================================================================
   Hero
   ================================================================= */
.hero { position: relative; overflow: hidden; padding-block: clamp(4rem, 2rem + 9vw, 8.5rem); }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: -2;
  background:
    radial-gradient(120% 90% at 88% -10%, var(--brand-blue-soft), transparent 55%),
    radial-gradient(80% 70% at -10% 110%, var(--brand-red-soft), transparent 60%);
}
.hero__grid {
  display: grid; grid-template-columns: 1.15fr 0.85fr; gap: clamp(2rem, 1rem + 4vw, 4.5rem);
  align-items: center;
}
/* 防止 grid/flex 子项因 min-width:auto 撑破容器导致横向溢出 */
.hero__grid > *, .feature > *, .contact-grid > * { min-width: 0; }
.hero__title {
  font-size: var(--text-hero); letter-spacing: -0.02em; margin: 1.2rem 0 0;
}
.hero__title .accent { color: var(--brand-blue); }
.hero__title .accent-red { color: var(--brand-red); }
.hero__lead {
  margin-top: 1.6rem; font-size: var(--text-lg); color: var(--color-ink-soft); max-width: 46ch;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2.4rem; }
.hero__meta {
  display: flex; gap: 2.5rem; margin-top: 3rem; padding-top: 2rem;
  border-top: 1px solid var(--color-line);
}
.hero__meta dt { font-size: var(--text-2xl); color: var(--brand-blue); font-weight: 700; font-family: var(--font-serif); }
.hero__meta dd { font-size: var(--text-sm); color: var(--color-ink-soft); margin-top: 0.2rem; }

/* Hero visual: 五方协同 orbit */
.hero__visual { position: relative; aspect-ratio: 1; display: grid; place-items: center; }
.orbit {
  position: relative; width: min(100%, 420px); aspect-ratio: 1;
  border-radius: 50%; border: 1px solid var(--color-line-strong);
  display: grid; place-items: center;
}
.orbit::after {
  content: ""; position: absolute; inset: 16%; border-radius: 50%;
  border: 1px dashed var(--color-line-strong);
}
.orbit__core {
  width: 38%; aspect-ratio: 1; border-radius: 50%;
  background: radial-gradient(circle at 35% 30%, #fff, var(--brand-blue-soft));
  box-shadow: var(--shadow-md); display: grid; place-items: center; padding: 8%;
}
.orbit__core img { width: 100%; }
.orbit__node {
  position: absolute; --r: 50%;
  background: #fff; border: 1px solid var(--color-line); border-radius: 999px;
  padding: 1rem 1.5rem; font-size: var(--text-lg); font-weight: 700;
  box-shadow: var(--shadow-md); white-space: nowrap;
}
.orbit__node:nth-child(2) { top: -3%; left: 50%; transform: translateX(-50%); }
.orbit__node:nth-child(3) { top: 30%; right: -10%; }
.orbit__node:nth-child(4) { bottom: 8%; right: -4%; }
.orbit__node:nth-child(5) { bottom: 8%; left: -4%; }
.orbit__node:nth-child(6) { top: 30%; left: -10%; }
.orbit__node b { color: var(--brand-red); }

/* =================================================================
   Cards & grids
   ================================================================= */
.grid { display: grid; gap: 1.5rem; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--auto { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
/* 五方角色卡：桌面端一行五张 */
.grid--five { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.2rem; }

.card {
  background: #fff; border: 1px solid var(--color-line); border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 1rem + 1.5vw, 2.2rem);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--color-line-strong); }
.card__num {
  font-family: var(--font-serif); font-size: 1.4rem; color: var(--brand-blue);
  border: 1px solid var(--color-line-strong); width: 2.6rem; height: 2.6rem;
  display: grid; place-items: center; border-radius: 50%; margin-bottom: 1rem;
}
.card h3 { font-size: var(--text-lg); }
.card p { color: var(--color-ink-soft); margin-top: 0.6rem; font-size: var(--text-sm); }

/* Platform split feature */
.feature {
  display: grid; grid-template-columns: 1fr 1fr; gap: clamp(1.5rem, 1rem + 3vw, 4rem);
  align-items: center;
}
.feature--flip .feature__media { order: 2; }
.feature__media {
  border-radius: var(--radius-lg); padding: clamp(1.5rem, 1rem + 2vw, 2.5rem);
  background: linear-gradient(150deg, var(--brand-blue) 0%, var(--brand-blue-deep) 100%);
  color: #fff; box-shadow: var(--shadow-lg); position: relative; overflow: hidden;
}
.feature__media--red { background: linear-gradient(150deg, var(--brand-red), oklch(46% 0.17 27)); }
.feature__media::after {
  content: ""; position: absolute; right: -20%; bottom: -30%; width: 60%; aspect-ratio: 1;
  background: radial-gradient(circle, #ffffff1c, transparent 70%); border-radius: 50%;
}
/* 文字置于高光圆之上，避免被冲淡 */
.feature__media > * { position: relative; z-index: 1; }
.feature__media h3 { font-size: var(--text-xl); text-shadow: 0 1px 2px #00000026; }
.feature__media ul { margin-top: 1.4rem; display: grid; gap: 0.8rem; }
.feature__media li {
  display: flex; gap: 0.7rem; align-items: baseline; font-size: var(--text-base);
  font-weight: 500; color: #fff; letter-spacing: 0.01em; text-shadow: 0 1px 2px #00000026;
  padding-bottom: 0.8rem; border-bottom: 1px solid #ffffff2e;
}
.feature__media li::before { content: "›"; color: #fff; font-weight: 700; }
.feature__body h2 { font-size: var(--text-xl); margin: 0.8rem 0 1rem; }
.feature__body p { color: var(--color-ink-soft); }
.feature__body .btn { margin-top: 1.6rem; }

/* Module list (sub systems) */
.modules { display: grid; gap: 1px; background: var(--color-line); border-radius: var(--radius-lg); overflow: hidden; }
.module { background: #fff; padding: clamp(1.4rem, 1rem + 1.5vw, 2rem); }
.module:hover { background: var(--brand-blue-soft); }
.module h3 { font-size: var(--text-lg); display: flex; align-items: center; gap: 0.6rem; }
.module h3 .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--brand-red); }
.module ul { margin-top: 0.9rem; display: grid; gap: 0.45rem; }
.module li { font-size: var(--text-sm); color: var(--color-ink-soft); padding-left: 1.1rem; position: relative; }
.module li::before { content: ""; position: absolute; left: 0; top: 0.72em; width: 5px; height: 5px; background: var(--brand-blue); border-radius: 50%; }

/* Case list（行业案例名称条） */
.caselist { display: flex; flex-wrap: wrap; gap: 0.9rem; }
.caselist__item {
  display: inline-flex; align-items: center;
  padding: 0.7rem 1.3rem; border-radius: 999px; font-size: var(--text-sm); font-weight: 600;
  color: var(--brand-blue-deep); background: #fff; border: 1px solid var(--color-line);
  box-shadow: var(--shadow-sm);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.caselist__item::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--brand-red); margin-right: 0.6rem; }
.caselist__item:hover { transform: translateY(-2px); border-color: var(--brand-blue); }

/* Stat band */
.statband { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--color-line); }
.statband__item { background: var(--color-surface); padding: clamp(1.6rem, 1rem + 2vw, 2.4rem); text-align: center; }
.statband__item b { display: block; font-family: var(--font-serif); font-size: var(--text-2xl); color: var(--brand-blue); }
.statband__item span { font-size: var(--text-sm); color: var(--color-ink-soft); }

/* CTA band */
.cta-band {
  background: linear-gradient(135deg, var(--brand-blue-deep), var(--brand-blue));
  color: #fff; border-radius: var(--radius-lg); padding: clamp(2.5rem, 2rem + 4vw, 4.5rem);
  text-align: center; position: relative; overflow: hidden; box-shadow: var(--shadow-lg);
}
.cta-band::before {
  content: ""; position: absolute; inset: 0; z-index: 0;
  background: radial-gradient(60% 120% at 100% 0%, #ffffff22, transparent 60%);
}
.cta-band > * { position: relative; }
.cta-band h2 { font-size: var(--text-2xl); }
.cta-band p { margin: 1rem auto 2rem; max-width: 50ch; color: #ffffffcc; }
.cta-band .btn--primary { background: #fff; color: var(--brand-blue-deep); }
.cta-band .btn--primary:hover { background: var(--brand-red); color: #fff; }

/* =================================================================
   Prose (about / policy pages)
   ================================================================= */
.page-hero { padding-block: clamp(2.8rem, 1.6rem + 4.5vw, 4.5rem) clamp(1.8rem, 1rem + 2.5vw, 2.6rem); background: var(--color-surface-2); border-bottom: 1px solid var(--color-line); }
.page-hero h1 { font-size: var(--text-2xl); margin-top: 0.8rem; }
.page-hero p { color: var(--color-ink-soft); font-size: var(--text-lg); margin-top: 1rem; max-width: 60ch; }
/* 内页首屏后的第一段正文收紧留白，避免"页面显空" */
.page-hero + .section { padding-block-start: clamp(2.5rem, 1.5rem + 3vw, 4rem); }
.prose { max-width: 72ch; }
.prose h2 { font-size: var(--text-xl); margin: 2.5rem 0 1rem; }
.prose h3 { font-size: var(--text-lg); margin: 1.8rem 0 0.7rem; }
.prose p, .prose li { color: var(--color-ink-soft); }
.prose p { margin-bottom: 1rem; }
.prose ul { display: grid; gap: 0.5rem; margin: 1rem 0 1.5rem; }
.prose ul li { padding-left: 1.3rem; position: relative; }
.prose ul li::before { content: ""; position: absolute; left: 0; top: 0.72em; width: 6px; height: 6px; background: var(--brand-blue); border-radius: 50%; }
.prose strong { color: var(--color-ink); }

/* =================================================================
   Trust band（信任背书条）
   ================================================================= */
.trustband {
  border-block: 1px solid var(--color-line);
  background: var(--color-surface-2);
  padding-block: clamp(1.4rem, 1rem + 1.5vw, 2.2rem);
}
.trustband__inner { display: grid; gap: 1rem; }
.trustband__label {
  font-size: var(--text-xs); letter-spacing: 0.18em; color: var(--color-ink-soft);
  text-transform: uppercase; font-weight: 700;
}
.trustband__label b { color: var(--brand-blue); }
.trustband__list { display: flex; flex-wrap: wrap; gap: 0.7rem 2.2rem; }
.trustband__list li {
  font-size: var(--text-lg); font-weight: 700; color: var(--color-ink);
  display: inline-flex; align-items: center; gap: 0.6rem; white-space: nowrap;
}
.trustband__list li::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--brand-red); }

/* =================================================================
   Roles（五方角色价值区）
   ================================================================= */
.role-card { position: relative; overflow: hidden; }
.role-card__tag {
  display: inline-block; font-size: var(--text-xs); font-weight: 700; letter-spacing: 0.14em;
  color: var(--brand-blue); background: var(--brand-blue-soft);
  border-radius: 999px; padding: 0.25rem 0.8rem; margin-bottom: 0.9rem;
}
.role-card ul { margin-top: 0.8rem; display: grid; gap: 0.4rem; }
.role-card li { font-size: var(--text-sm); color: var(--color-ink-soft); padding-left: 1.1rem; position: relative; }
.role-card li::before { content: ""; position: absolute; left: 0; top: 0.7em; width: 5px; height: 5px; background: var(--brand-red); border-radius: 50%; }

/* =================================================================
   Gallery（功能画廊 · 真实系统截图）
   ================================================================= */
.gallery { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.4rem; grid-auto-flow: dense; }
.shot { grid-column: span 2; display: flex; flex-direction: column; gap: 0.9rem; min-width: 0; }
.shot--phone { grid-column: span 1; }
.shot__frame {
  position: relative; border-radius: 12px; overflow: hidden;
  border: 1px solid var(--color-line); background: #fff; box-shadow: var(--shadow-md);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.shot:hover .shot__frame { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
/* 浏览器窗框 */
.shot__frame--browser { padding-top: 30px; }
.shot__frame--browser::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 30px;
  background: var(--color-surface-2); border-bottom: 1px solid var(--color-line);
}
.shot__frame--browser::after {
  content: ""; position: absolute; top: 12px; left: 14px; width: 8px; height: 8px;
  border-radius: 50%; background: var(--brand-red);
  box-shadow: 14px 0 0 oklch(80% 0.14 85), 28px 0 0 oklch(70% 0.17 145);
}
/* 手机窗框 */
.shot__frame--phone {
  border-radius: 26px; padding: 10px; background: var(--color-ink);
  border-color: var(--color-ink);
}
.shot__frame--phone img { border-radius: 18px; }
.shot__frame img { width: 100%; height: auto; }
.shot figcaption { display: grid; gap: 0.15rem; }
.shot__tag { font-size: var(--text-xs); letter-spacing: 0.16em; font-weight: 700; color: var(--brand-red); text-transform: uppercase; }
.shot__title { font-size: var(--text-sm); font-weight: 600; color: var(--color-ink); }

/* =================================================================
   Case cards（客户案例）
   ================================================================= */
.case-card { padding: 0; overflow: hidden; display: flex; flex-direction: column; }
.case-card__media { aspect-ratio: 16 / 9; overflow: hidden; background: var(--color-surface-2); border-bottom: 1px solid var(--color-line); }
.case-card__media img { width: 100%; height: 100%; object-fit: cover; object-position: top; transition: transform var(--dur) var(--ease); }
.case-card:hover .case-card__media img { transform: scale(1.03); }
.case-card__media--empty {
  display: grid; place-items: center;
  background: linear-gradient(150deg, var(--brand-blue-soft), var(--color-surface-2));
}
.case-card__media--empty span {
  font-family: var(--font-serif); font-size: var(--text-2xl); color: var(--brand-blue);
  opacity: 0.55; font-weight: 700;
}
.case-card__body { padding: clamp(1.3rem, 1rem + 1vw, 1.8rem); display: grid; gap: 0.6rem; }
.case-card__body h3 { font-size: var(--text-lg); }
.case-card__body p { color: var(--color-ink-soft); font-size: var(--text-sm); }

/* =================================================================
   Timeline（发展历程）
   ================================================================= */
.timeline { display: grid; gap: 0; max-width: 720px; }
.timeline__item {
  position: relative; padding: 0 0 2rem 2.2rem;
  border-left: 2px solid var(--color-line-strong);
}
.timeline__item:last-child { padding-bottom: 0.4rem; }
.timeline__item::before {
  content: ""; position: absolute; left: -7px; top: 0.35em;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--brand-red); border: 2px solid #fff; box-shadow: var(--shadow-sm);
}
.timeline__year { font-family: var(--font-serif); font-size: var(--text-xl); color: var(--brand-blue); font-weight: 700; line-height: 1.1; }
.timeline__item h3 { font-size: var(--text-lg); margin-top: 0.4rem; }
.timeline__item p { color: var(--color-ink-soft); font-size: var(--text-sm); margin-top: 0.35rem; max-width: 56ch; }

/* =================================================================
   Contact form
   ================================================================= */
.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(2rem, 1rem + 3vw, 4rem); align-items: start; }
.contact-info { display: grid; gap: 1.4rem; }
.contact-info__item { display: grid; gap: 0.3rem; padding-bottom: 1.4rem; border-bottom: 1px solid var(--color-line); }
.contact-info__item dt { font-size: var(--text-xs); letter-spacing: 0.16em; text-transform: uppercase; color: var(--brand-red); font-weight: 700; }
.contact-info__item dd { font-size: var(--text-lg); }

.form-card { background: #fff; border: 1px solid var(--color-line); border-radius: var(--radius-lg); padding: clamp(1.6rem, 1rem + 2vw, 2.6rem); box-shadow: var(--shadow-sm); }
.field { margin-bottom: 1.2rem; }
.field label { display: block; font-size: var(--text-sm); font-weight: 600; margin-bottom: 0.4rem; }
.field .req { color: var(--brand-red); }
.field input, .field select, .field textarea {
  width: 100%; padding: 0.8rem 1rem; font: inherit; font-size: var(--text-sm);
  border: 1px solid var(--color-line-strong); border-radius: var(--radius); background: var(--color-surface);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--brand-blue);
  box-shadow: 0 0 0 3px var(--brand-blue-soft);
}
.field textarea { resize: vertical; min-height: 130px; }
.field--hp { position: absolute; left: -9999px; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; }
.field-error { color: var(--brand-red); font-size: var(--text-xs); margin-top: 0.35rem; }
.alert { padding: 0.9rem 1.2rem; border-radius: var(--radius); margin-bottom: 1.4rem; font-size: var(--text-sm); }
.alert--ok { background: var(--brand-blue-soft); color: var(--brand-blue-deep); border: 1px solid var(--brand-blue); }
.alert--err { background: var(--brand-red-soft); color: oklch(40% 0.16 27); border: 1px solid var(--brand-red); }

/* ---------- Footer ---------- */
.site-footer { background: var(--brand-blue-deep); color: #ffffffcc; padding-top: clamp(3rem, 2rem + 3vw, 4.5rem); }
.site-footer__grid { display: grid; grid-template-columns: 1.4fr 1fr 1.2fr 0.8fr; gap: 2rem; padding-bottom: 3rem; }
.site-footer__brand img { background: #fff; border-radius: 10px; padding: 6px; }
.site-footer__name { margin-top: 1rem; color: #fff; font-weight: 600; }
.site-footer__tag { font-size: var(--text-sm); margin-top: 0.3rem; }
.site-footer h2 { font-size: var(--text-sm); color: #fff; letter-spacing: 0.1em; margin-bottom: 1rem; }
.site-footer__col ul { display: grid; gap: 0.6rem; }
.site-footer__col a, .site-footer__contact { font-size: var(--text-sm); }
.site-footer__col a:hover { color: #fff; }
.site-footer__contact li { margin-bottom: 0.5rem; }
.site-footer__contact a:hover { color: #fff; }
.site-footer__legal {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem 1.5rem;
  padding-block: 1.5rem; border-top: 1px solid #ffffff22; font-size: var(--text-xs); color: #ffffff88;
}
.site-footer__legal a { color: #ffffff88; text-decoration: none; transition: color var(--duration-fast); }
.site-footer__legal a:hover, .site-footer__legal a:focus-visible { color: #fff; }

/* =================================================================
   Responsive
   ================================================================= */
@media (max-width: 920px) {
  .hero__grid, .feature, .feature--flip .feature__media, .contact-grid { grid-template-columns: 1fr; }
  .feature--flip .feature__media { order: 0; }
  .grid--3, .statband { grid-template-columns: repeat(2, 1fr); }
  .gallery { grid-template-columns: repeat(2, 1fr); }
  .shot { grid-column: span 2; }
  .shot--phone { grid-column: span 1; }
  .hero__visual { max-width: 330px; margin-inline: auto; padding-inline: 2.2rem; }
  /* 窄屏：节点更小并内收，避免被裁切 */
  .orbit__node { font-size: var(--text-xs); padding: 0.35rem 0.7rem; }
  .orbit__node:nth-child(3) { right: 0; }
  .orbit__node:nth-child(4) { right: 4%; }
  .orbit__node:nth-child(5) { left: 4%; }
  .orbit__node:nth-child(6) { left: 0; }
  .hero__lead { max-width: 100%; font-size: var(--text-base); }
}
@media (max-width: 720px) {
  .nav__toggle { display: flex; }
  .nav__list {
    position: absolute; top: 72px; right: 0; left: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--color-surface); border-bottom: 1px solid var(--color-line);
    padding: 0.5rem 6vw 1.5rem; box-shadow: var(--shadow-md);
    clip-path: inset(0 0 100% 0); transition: clip-path var(--dur) var(--ease);
  }
  .nav__list[data-open] { clip-path: inset(0 0 0 0); }
  .nav__list > li > a { padding: 0.9rem 0.4rem; }
  .nav__cta { text-align: center; margin-top: 0.6rem; }
  .grid--2, .grid--3, .statband, .field-row { grid-template-columns: 1fr; }
  .hero__meta { flex-wrap: wrap; gap: 1.5rem; }
  .gallery { grid-template-columns: 1fr; }
  .shot, .shot--phone { grid-column: span 1; }
  .shot--phone .shot__frame { max-width: 320px; margin-inline: auto; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition-duration: 0.01ms !important; scroll-behavior: auto; }
  [data-reveal] { opacity: 1; transform: none; }
}