/* ==========================================================================
   SRACING 静态前端 · 设计系统「白色速度」
   亮色极简奢华风 · 与 WP 主题 (sracing) 共用同一套视觉令牌
   ========================================================================== */

@font-face {
  font-family: 'Archivo';
  src: url('/static/fonts/archivo-var.woff2') format('woff2-variations');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

:root {
  --sr-bg: #f8f7f5;
  --sr-surface: #ffffff;
  --sr-ink: #0b0d12;
  --sr-ink-70: rgba(11, 13, 18, 0.7);
  --sr-mute: #6b7280;
  --sr-accent: #ff5a1f;
  --sr-accent-deep: #e14e12;
  --sr-accent-soft: rgba(255, 90, 31, 0.08);
  --sr-line: rgba(11, 13, 18, 0.12);
  --sr-line-soft: rgba(11, 13, 18, 0.07);

  --sr-font: 'Archivo', 'PingFang SC', 'Hiragino Sans GB', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --sr-mono-num: 'Archivo', 'PingFang SC', sans-serif;

  --sr-header-h: 4.5rem;
  --sr-pad: clamp(1.25rem, 4vw, 4rem);
  --sr-max: 84rem;
  --sr-radius: 4px;
  --sr-ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body.sr-app {
  margin: 0;
  background: var(--sr-bg);
  color: var(--sr-ink);
  font-family: var(--sr-font);
  font-size: 1rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection { background: var(--sr-accent); color: #fff; }

a { color: inherit; }

img { max-width: 100%; height: auto; display: block; }

h1, h2, h3, h4 { line-height: 1.15; margin: 0; letter-spacing: -0.02em; }

p { margin: 0; }

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

.sr-skip {
  position: absolute; left: -999px; top: 0;
  background: var(--sr-ink); color: #fff;
  padding: 0.6rem 1rem; z-index: 200; font-size: 0.875rem;
}
.sr-skip:focus { left: 0.5rem; top: 0.5rem; }

/* 数字一律等宽，数据对齐 */
.sr-num, [data-count], time, .sr-spec__value, .sr-card__index {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
}

/* ==========================================================================
   按钮
   ========================================================================== */

.sr-btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: inherit; font-size: 0.9375rem; font-weight: 600;
  text-decoration: none; cursor: pointer;
  padding: 0.8rem 1.7rem; border-radius: 999px; border: 1px solid transparent;
  transition: background 0.25s var(--sr-ease), color 0.25s var(--sr-ease),
              border-color 0.25s var(--sr-ease), transform 0.25s var(--sr-ease);
}
.sr-btn--primary { background: var(--sr-accent); color: #fff; }
.sr-btn--primary:hover { background: var(--sr-accent-deep); transform: translateY(-2px); }
.sr-btn--ghost { background: transparent; color: var(--sr-ink); border-color: var(--sr-line); }
.sr-btn--ghost:hover { border-color: var(--sr-ink); transform: translateY(-2px); }
.sr-btn--dark { background: var(--sr-ink); color: #fff; }
.sr-btn--dark:hover { background: #23262e; transform: translateY(-2px); }
.sr-btn .sr-btn__arrow { transition: transform 0.25s var(--sr-ease); }
.sr-btn:hover .sr-btn__arrow { transform: translateX(4px); }

/* ==========================================================================
   页眉
   ========================================================================== */

.sr-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  transition: transform 0.4s var(--sr-ease), background 0.3s ease,
              box-shadow 0.3s ease, backdrop-filter 0.3s ease;
}
.sr-header__inner {
  max-width: var(--sr-max); margin-inline: auto;
  padding-inline: var(--sr-pad);
  height: var(--sr-header-h);
  display: flex; align-items: center; justify-content: space-between; gap: 2rem;
  transition: height 0.3s var(--sr-ease);
}
.sr-header.is-scrolled {
  background: rgba(248, 247, 245, 0.82);
  -webkit-backdrop-filter: blur(14px); backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 var(--sr-line);
}
.sr-header.is-scrolled .sr-header__inner { height: 3.6rem; }
.sr-header.is-hidden { transform: translateY(-100%); }

.sr-header__brand {
  display: flex; align-items: baseline; gap: 0.65rem; text-decoration: none; flex-shrink: 0;
}
.sr-header__logo {
  font-weight: 800; font-size: 1.35rem; letter-spacing: 0.02em;
  font-stretch: 110%; line-height: 1;
}
.sr-header__logo i { color: var(--sr-accent); font-style: normal; }
.sr-header__brand-sub {
  font-size: 0.72rem; color: var(--sr-mute); letter-spacing: 0.14em;
  padding-left: 0.65rem; border-left: 1px solid var(--sr-line);
  white-space: nowrap;
}

.sr-header__nav { display: flex; gap: clamp(1rem, 2.4vw, 2.1rem); }
.sr-header__nav a {
  position: relative; text-decoration: none; font-size: 0.9375rem; font-weight: 500;
  color: var(--sr-ink-70); padding: 0.4rem 0.1rem;
  transition: color 0.2s ease;
}
.sr-header__nav a::after {
  content: ""; position: absolute; left: 0; right: 100%; bottom: 0;
  height: 2px; background: var(--sr-accent);
  transition: right 0.28s var(--sr-ease);
}
.sr-header__nav a:hover { color: var(--sr-ink); }
.sr-header__nav a:hover::after { right: 0; }
.sr-header__nav a[aria-current="page"] { color: var(--sr-ink); font-weight: 600; }
.sr-header__nav a[aria-current="page"]::after { right: 0; }

.sr-header__actions { display: flex; align-items: center; gap: 1rem; }
.sr-header__cta { padding: 0.6rem 1.35rem; font-size: 0.875rem; }

.sr-header__burger {
  display: none; flex-direction: column; justify-content: center; gap: 6px;
  width: 2.6rem; height: 2.6rem; padding: 0 0.55rem;
  background: none; border: 1px solid var(--sr-line); border-radius: 999px; cursor: pointer;
}
.sr-header__burger span {
  display: block; height: 2px; background: var(--sr-ink);
  transition: transform 0.3s var(--sr-ease), opacity 0.2s ease;
}
.sr-header__burger[aria-expanded="true"] span:first-child { transform: translateY(4px) rotate(45deg); }
.sr-header__burger[aria-expanded="true"] span:last-child { transform: translateY(-4px) rotate(-45deg); }

/* 移动端全屏菜单 */
.sr-mmenu {
  position: fixed; inset: 0; z-index: 90; background: var(--sr-bg);
  display: flex; flex-direction: column; justify-content: center;
  padding: var(--sr-pad);
  opacity: 0; visibility: hidden; transition: opacity 0.35s ease, visibility 0.35s;
}
.sr-mmenu.is-open { opacity: 1; visibility: visible; }
.sr-mmenu__nav { display: flex; flex-direction: column; gap: 0.4rem; }
.sr-mmenu__nav a {
  display: flex; align-items: baseline; gap: 1rem;
  font-size: clamp(1.9rem, 8vw, 3rem); font-weight: 700; letter-spacing: -0.02em;
  text-decoration: none; padding: 0.35rem 0; border-bottom: 1px solid var(--sr-line-soft);
  opacity: 0; transform: translateY(18px);
  transition: opacity 0.5s var(--sr-ease), transform 0.5s var(--sr-ease), color 0.2s;
}
.sr-mmenu.is-open .sr-mmenu__nav a { opacity: 1; transform: none; }
.sr-mmenu__nav a:hover { color: var(--sr-accent); }
.sr-mmenu__nav em {
  font-style: normal; font-size: 0.8rem; font-weight: 600; color: var(--sr-accent);
  letter-spacing: 0.1em;
}
.sr-mmenu__foot { margin-top: 3rem; color: var(--sr-mute); font-size: 0.875rem; letter-spacing: 0.08em; }

/* ==========================================================================
   视图容器与通用区块
   ========================================================================== */

.sr-view { min-height: 60vh; outline: none; }

.sr-wrap { max-width: var(--sr-max); margin-inline: auto; padding-inline: var(--sr-pad); }

.sr-eyebrow {
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--sr-accent);
}
.sr-display {
  font-size: clamp(2.4rem, 6.5vw, 5.2rem);
  font-weight: 800; letter-spacing: -0.035em; line-height: 1.04;
}
.sr-display .sr-accent { color: var(--sr-accent); }
.sr-lead { color: var(--sr-mute); font-size: clamp(1rem, 1.4vw, 1.15rem); max-width: 56ch; }

.sr-sec { padding-block: clamp(4rem, 9vw, 7.5rem); }
.sr-sec + .sr-sec { border-top: 1px solid var(--sr-line-soft); }

.sr-sec-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 2rem; margin-bottom: clamp(2.2rem, 5vw, 3.8rem); }
.sr-sec-head__no {
  font-size: 0.8rem; font-weight: 700; letter-spacing: 0.18em; color: var(--sr-mute);
}
.sr-sec-head__no b { color: var(--sr-accent); font-weight: 700; }
.sr-sec-head h2 { font-size: clamp(1.9rem, 4.2vw, 3.2rem); font-weight: 800; letter-spacing: -0.03em; margin-top: 0.6rem; }
.sr-sec-head .sr-link-all {
  flex-shrink: 0; font-weight: 600; font-size: 0.9375rem; text-decoration: none;
  border-bottom: 1px solid var(--sr-line); padding-bottom: 0.2rem;
  transition: color 0.2s, border-color 0.2s;
}
.sr-sec-head .sr-link-all:hover { color: var(--sr-accent); border-color: var(--sr-accent); }

/* 箭头链接 */
.sr-arrow-link {
  display: inline-flex; align-items: center; gap: 0.45rem;
  font-weight: 600; font-size: 0.9375rem; text-decoration: none; color: var(--sr-accent);
}
.sr-arrow-link svg { transition: transform 0.25s var(--sr-ease); }
.sr-arrow-link:hover svg { transform: translateX(5px); }

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

.sr-hero { position: relative; min-height: 100svh; display: flex; flex-direction: column; overflow: clip; }
.sr-hero__canvas {
  position: absolute; inset: 0; z-index: 0;
}
.sr-hero__canvas canvas { display: block; width: 100%; height: 100%; }
.sr-hero__inner {
  position: relative; z-index: 1;
  flex: 1; display: flex; flex-direction: column; justify-content: center;
  max-width: var(--sr-max); margin-inline: auto; width: 100%;
  padding: calc(var(--sr-header-h) + 3rem) var(--sr-pad) 3rem;
}
.sr-hero__eyebrow { margin-bottom: 1.4rem; }
.sr-hero__title {
  font-size: clamp(2.9rem, 8.6vw, 7rem);
  font-weight: 800; letter-spacing: -0.04em; line-height: 1.02;
}
.sr-hero__title .line { display: block; overflow: hidden; }
.sr-hero__title .line > span { display: block; }
.sr-hero__title .sr-accent { color: var(--sr-accent); }
.sr-hero__tagline {
  margin-top: 1.6rem; font-size: clamp(1.2rem, 2.4vw, 1.7rem);
  font-weight: 600; letter-spacing: -0.01em; max-width: 26ch;
}
.sr-hero__sub { margin-top: 1rem; }
.sr-hero__cta { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2.4rem; }

.sr-hero__stats {
  position: relative; z-index: 1;
  border-top: 1px solid var(--sr-line);
  background: rgba(248, 247, 245, 0.6);
  -webkit-backdrop-filter: blur(8px); backdrop-filter: blur(8px);
}
.sr-hero__stats-row {
  max-width: var(--sr-max); margin-inline: auto; padding: 1.4rem var(--sr-pad);
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem;
}
.sr-stat { display: grid; gap: 0.1rem; }
.sr-stat__num {
  font-size: clamp(1.7rem, 3.4vw, 2.6rem); font-weight: 800; letter-spacing: -0.02em; line-height: 1.1;
}
.sr-stat__num sup { font-size: 0.45em; color: var(--sr-accent); font-weight: 700; margin-left: 0.1em; }
.sr-stat__label { font-size: 0.8rem; letter-spacing: 0.12em; color: var(--sr-mute); text-transform: uppercase; }

/* ==========================================================================
   跑马灯
   ========================================================================== */

.sr-marquee {
  background: var(--sr-ink); color: var(--sr-bg);
  overflow: hidden; padding: 1.05rem 0;
  transform: rotate(0.001deg);
}
.sr-marquee__track {
  display: flex; gap: 3.2rem; width: max-content;
  animation: sr-marquee 26s linear infinite;
}
.sr-marquee__track span {
  display: flex; align-items: center; gap: 3.2rem;
  font-size: 0.95rem; font-weight: 600; letter-spacing: 0.26em;
  text-transform: uppercase; white-space: nowrap;
}
.sr-marquee__track i { color: var(--sr-accent); font-style: normal; }
@keyframes sr-marquee { to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) {
  .sr-marquee__track { animation: none; }
}

/* ==========================================================================
   服务卡片
   ========================================================================== */

.sr-services { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid var(--sr-line); }
.sr-service {
  position: relative; padding: 2.2rem 1.8rem 2.6rem;
  border-bottom: 1px solid var(--sr-line);
  text-decoration: none; display: flex; flex-direction: column; gap: 0.9rem;
  transition: background 0.3s ease;
}
.sr-service + .sr-service { border-left: 1px solid var(--sr-line); }
.sr-service:hover { background: var(--sr-surface); }
.sr-service__no {
  font-size: 0.8rem; font-weight: 700; letter-spacing: 0.16em; color: var(--sr-mute);
  transition: color 0.25s ease;
}
.sr-service:hover .sr-service__no { color: var(--sr-accent); }
.sr-service h3 { font-size: 1.35rem; font-weight: 700; letter-spacing: -0.02em; }
.sr-service p { color: var(--sr-mute); font-size: 0.9375rem; flex: 1; }
.sr-service__go {
  margin-top: 0.4rem; color: var(--sr-accent); font-weight: 600; font-size: 0.9rem;
  display: inline-flex; align-items: center; gap: 0.4rem;
}
.sr-service__go svg { transition: transform 0.25s var(--sr-ease); }
.sr-service:hover .sr-service__go svg { transform: translateX(5px); }

/* ==========================================================================
   数据卡片（车/赛道/产品通用）
   ========================================================================== */

.sr-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; }
.sr-grid--2 { grid-template-columns: repeat(2, 1fr); }
.sr-grid--4 { grid-template-columns: repeat(4, 1fr); }

.sr-card {
  position: relative; display: flex; flex-direction: column;
  background: var(--sr-surface); border: 1px solid var(--sr-line-soft);
  border-radius: var(--sr-radius);
  padding: 1.8rem 1.7rem 1.6rem; text-decoration: none;
  transition: transform 0.35s var(--sr-ease), box-shadow 0.35s var(--sr-ease), border-color 0.3s ease;
}
.sr-card:hover {
  transform: translateY(-5px);
  border-color: var(--sr-line);
  box-shadow: 0 24px 48px -20px rgba(11, 13, 18, 0.22);
}
.sr-card__top { display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; margin-bottom: 1.6rem; }
.sr-card__index { font-size: 0.82rem; font-weight: 700; letter-spacing: 0.14em; color: var(--sr-mute); }
.sr-card__tag {
  font-size: 0.72rem; font-weight: 600; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--sr-accent); background: var(--sr-accent-soft);
  border-radius: 999px; padding: 0.22rem 0.7rem; white-space: nowrap;
}
.sr-card__title {
  font-size: 1.45rem; font-weight: 750; letter-spacing: -0.02em; line-height: 1.2;
  display: flex; align-items: flex-start; justify-content: space-between; gap: 0.8rem;
}
.sr-card__title svg { flex-shrink: 0; margin-top: 0.3rem; color: var(--sr-line); transition: color 0.25s ease, transform 0.3s var(--sr-ease); }
.sr-card:hover .sr-card__title svg { color: var(--sr-accent); transform: translate(3px, -3px); }
.sr-card__img, .sr-detail__img {
  width: 100%; aspect-ratio: 16 / 10; object-fit: cover;
  border-radius: var(--sr-radius); margin-bottom: 1.1rem;
  background: var(--sr-line-soft);
}
.sr-detail__img { aspect-ratio: 16 / 9; margin-bottom: 0; }
.sr-card__excerpt {
  margin-top: 0.55rem; color: var(--sr-mute); font-size: 0.9375rem;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.sr-card__specs {
  margin-top: 1.4rem; padding-top: 1.1rem; border-top: 1px solid var(--sr-line-soft);
  display: flex; flex-wrap: wrap; gap: 1.1rem 1.6rem;
}
.sr-card__spec { display: grid; gap: 0.05rem; }
.sr-card__spec b { font-size: 1.02rem; font-weight: 750; font-variant-numeric: tabular-nums; letter-spacing: -0.01em; }
.sr-card__spec span { font-size: 0.72rem; letter-spacing: 0.08em; color: var(--sr-mute); text-transform: uppercase; }

/* ==========================================================================
   产品条 & 暗色 CTA
   ========================================================================== */

.sr-product-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-block: 1px solid var(--sr-line); }
.sr-product {
  padding: 2rem 1.8rem; text-decoration: none; display: flex; flex-direction: column; gap: 0.6rem;
  transition: background 0.3s ease;
}
.sr-product + .sr-product { border-left: 1px solid var(--sr-line); }
.sr-product:hover { background: var(--sr-surface); }
.sr-product__cat { font-size: 0.75rem; font-weight: 700; letter-spacing: 0.16em; color: var(--sr-accent); text-transform: uppercase; }
.sr-product h3 { font-size: 1.25rem; font-weight: 750; letter-spacing: -0.015em; }
.sr-product p { color: var(--sr-mute); font-size: 0.9rem; flex: 1; }
.sr-product__ver { font-size: 0.78rem; color: var(--sr-mute); font-variant-numeric: tabular-nums; }

.sr-band {
  background: var(--sr-ink); color: var(--sr-bg);
  padding-block: clamp(4.5rem, 10vw, 8rem);
  position: relative; overflow: clip;
}
.sr-band .sr-eyebrow { color: var(--sr-accent); }
.sr-band h2 {
  font-size: clamp(2.2rem, 6vw, 4.6rem); font-weight: 800; letter-spacing: -0.035em;
  max-width: 18ch; margin-top: 1rem;
}
.sr-band p { margin-top: 1.2rem; color: rgba(248, 247, 245, 0.65); max-width: 52ch; }
.sr-band .sr-btn { margin-top: 2.2rem; }
.sr-band__glow {
  position: absolute; right: -12%; top: 50%; translate: 0 -50%;
  width: min(44vw, 560px); aspect-ratio: 1; border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 90, 31, 0.34), rgba(255, 90, 31, 0) 62%);
  pointer-events: none; filter: blur(6px);
}

/* ==========================================================================
   数据中心枢纽 / 列表页 / 详情页
   ========================================================================== */

.sr-page-head {
  padding: calc(var(--sr-header-h) + clamp(3rem, 8vw, 6rem)) 0 clamp(2.5rem, 6vw, 4.5rem);
  border-bottom: 1px solid var(--sr-line);
}
.sr-page-head__row {
  display: flex; align-items: flex-end; justify-content: space-between; gap: 2rem;
}
.sr-page-head h1 { font-size: clamp(2.6rem, 7vw, 5.4rem); font-weight: 800; letter-spacing: -0.04em; margin-top: 0.8rem; }
.sr-page-head .sr-count {
  font-size: clamp(2.6rem, 6vw, 4.6rem); font-weight: 800; letter-spacing: -0.03em;
  color: var(--sr-line); line-height: 1; font-variant-numeric: tabular-nums; white-space: nowrap;
}
.sr-page-head .sr-count b { color: var(--sr-accent); font-weight: 800; }
.sr-page-head .sr-lead { margin-top: 1.1rem; }

.sr-hub { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--sr-line); border-radius: var(--sr-radius); overflow: hidden; }
.sr-hub__cell {
  padding: clamp(2.4rem, 5vw, 4rem); text-decoration: none; position: relative;
  display: flex; flex-direction: column; gap: 1rem; min-height: 22rem;
  transition: background 0.3s ease;
}
.sr-hub__cell + .sr-hub__cell { border-left: 1px solid var(--sr-line); }
.sr-hub__cell:hover { background: var(--sr-surface); }
.sr-hub__no { font-size: 0.85rem; font-weight: 700; letter-spacing: 0.18em; color: var(--sr-mute); }
.sr-hub__cell h2 { font-size: clamp(2rem, 4.6vw, 3.4rem); font-weight: 800; letter-spacing: -0.03em; }
.sr-hub__cell p { color: var(--sr-mute); max-width: 40ch; }
.sr-hub__go { margin-top: auto; }

/* 筛选 chips */
.sr-filters { display: flex; flex-wrap: wrap; gap: 0.6rem; margin: 2rem 0 2.6rem; }
.sr-chip {
  font-family: inherit; font-size: 0.875rem; font-weight: 500; cursor: pointer;
  padding: 0.45rem 1.1rem; border-radius: 999px;
  border: 1px solid var(--sr-line); background: transparent; color: var(--sr-ink-70);
  transition: all 0.22s ease;
}
.sr-chip:hover { border-color: var(--sr-ink); color: var(--sr-ink); }
.sr-chip.is-active { background: var(--sr-ink); border-color: var(--sr-ink); color: #fff; }
.sr-chip .sr-num { color: var(--sr-mute); margin-left: 0.3em; font-size: 0.8em; }
.sr-chip.is-active .sr-num { color: rgba(255,255,255,0.6); }

/* 规格表（详情页） */
.sr-spec { border-top: 1px solid var(--sr-line); }
.sr-spec__row {
  display: grid; grid-template-columns: minmax(9rem, 26%) 1fr; gap: 1rem;
  padding: 0.95rem 0.25rem; border-bottom: 1px solid var(--sr-line-soft);
  transition: background 0.2s ease;
}
.sr-spec__row:hover { background: var(--sr-surface); }
.sr-spec__label { font-size: 0.82rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--sr-mute); font-weight: 600; align-self: center; }
.sr-spec__value { font-size: 1.02rem; font-weight: 550; font-variant-numeric: tabular-nums; }

.sr-detail-layout { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: clamp(2rem, 6vw, 5rem); align-items: start; }
.sr-prose { max-width: 68ch; }
.sr-prose > * + * { margin-top: 1.1em; }
.sr-prose h2 { font-size: 1.6rem; font-weight: 750; letter-spacing: -0.02em; margin-top: 2.2em; }
.sr-prose h3 { font-size: 1.25rem; font-weight: 700; margin-top: 1.8em; }
.sr-prose p, .sr-prose li { color: var(--sr-ink-70); line-height: 1.9; }
.sr-prose ul, .sr-prose ol { padding-left: 1.3em; }
.sr-prose a { color: var(--sr-accent); }
.sr-prose blockquote {
  margin: 1.6em 0; padding: 0.4em 0 0.4em 1.3em; border-left: 3px solid var(--sr-accent);
  color: var(--sr-ink); font-weight: 550;
}
.sr-prose img { border-radius: var(--sr-radius); }

.sr-tagrow { display: flex; flex-wrap: wrap; gap: 0.5rem; list-style: none; margin: 0; padding: 0; }
.sr-tagrow a, .sr-tagrow span {
  font-size: 0.8rem; font-weight: 550; text-decoration: none;
  border: 1px solid var(--sr-line); border-radius: 999px; padding: 0.3rem 0.85rem;
  color: var(--sr-ink-70); transition: all 0.2s ease;
}
.sr-tagrow a:hover { border-color: var(--sr-accent); color: var(--sr-accent); }

.sr-back { display: inline-flex; align-items: center; gap: 0.45rem; text-decoration: none; font-size: 0.9rem; font-weight: 600; color: var(--sr-mute); transition: color 0.2s; }
.sr-back:hover { color: var(--sr-accent); }
.sr-back svg { transform: rotate(180deg); }

/* 骨架屏 */
.sr-skeleton { display: grid; gap: 1.4rem; grid-template-columns: repeat(3, 1fr); }
.sr-skel {
  border: 1px solid var(--sr-line-soft); border-radius: var(--sr-radius);
  background: var(--sr-surface); min-height: 15rem; padding: 1.8rem 1.7rem;
  display: flex; flex-direction: column; gap: 1rem;
}
.sr-skel i {
  display: block; height: 0.9rem; border-radius: 999px;
  background: linear-gradient(90deg, var(--sr-line-soft) 25%, rgba(11,13,18,0.05) 50%, var(--sr-line-soft) 75%);
  background-size: 200% 100%; animation: sr-shimmer 1.4s infinite linear;
}
.sr-skel i:nth-child(1) { width: 34%; }
.sr-skel i:nth-child(2) { width: 78%; height: 1.4rem; }
.sr-skel i:nth-child(3) { width: 58%; }
.sr-skel i:nth-child(4) { width: 66%; margin-top: auto; }
@keyframes sr-shimmer { to { background-position: -200% 0; } }

.sr-empty { padding: 4rem 0; color: var(--sr-mute); text-align: center; border: 1px dashed var(--sr-line); border-radius: var(--sr-radius); }

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

.sr-footer { background: var(--sr-ink); color: rgba(248, 247, 245, 0.72); margin-top: clamp(4rem, 9vw, 7rem); }
.sr-footer__inner { max-width: var(--sr-max); margin-inline: auto; padding: clamp(3.5rem, 7vw, 5.5rem) var(--sr-pad) 2rem; }
.sr-footer__mark {
  margin: 0 0 clamp(2.5rem, 6vw, 4rem);
  font-size: clamp(3.4rem, 12vw, 10rem); font-weight: 800; letter-spacing: -0.045em; line-height: 0.95;
  color: var(--sr-bg); display: flex; flex-wrap: wrap; align-items: baseline; gap: 0 2rem;
}
.sr-footer__mark span { font-size: 0.22em; font-weight: 500; letter-spacing: 0.3em; color: rgba(248, 247, 245, 0.4); }
.sr-footer__cols {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 2rem;
  padding-block: 2.4rem; border-block: 1px solid rgba(248, 247, 245, 0.14);
}
.sr-footer__col h2 { font-size: 0.8rem; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase; color: var(--sr-accent); margin-bottom: 1.1rem; }
.sr-footer__col ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.62rem; }
.sr-footer__col a { text-decoration: none; font-size: 0.92rem; color: rgba(248, 247, 245, 0.72); transition: color 0.2s ease, padding-left 0.25s var(--sr-ease); }
.sr-footer__col a:hover { color: var(--sr-accent); padding-left: 0.3rem; }
.sr-footer__bottom {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.8rem;
  padding-top: 1.6rem; font-size: 0.8rem; color: rgba(248, 247, 245, 0.45);
}
.sr-footer__bottom a { color: inherit; text-decoration: none; }
.sr-footer__bottom a:hover { color: var(--sr-accent); }
.sr-footer__badge { display: inline-flex; align-items: center; gap: 0.5rem; }
.sr-footer__badge::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--sr-accent); box-shadow: 0 0 0 3px rgba(255, 90, 31, 0.25); }

/* ==========================================================================
   动效钩子初始态（JS 加持前必须可见 → 默认可见，JS 再反设）
   ========================================================================== */

.sr-reveal { will-change: transform, opacity; }
.sr-viewsr-loading { opacity: 0; }

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

@media (max-width: 1024px) {
  .sr-services { grid-template-columns: repeat(2, 1fr); }
  .sr-service:nth-child(3) { border-left: 0; }
  .sr-service:nth-child(n+3) { border-top: 1px solid var(--sr-line); }
  .sr-grid, .sr-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .sr-product-row { grid-template-columns: 1fr; }
  .sr-product + .sr-product { border-left: 0; border-top: 1px solid var(--sr-line); }
  .sr-detail-layout { grid-template-columns: 1fr; }
  .sr-footer__cols { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 781px) {
  .sr-header__nav { display: none; }
  .sr-header__cta { display: none; }
  .sr-header__burger { display: flex; }
  .sr-hero__stats-row { grid-template-columns: repeat(2, 1fr); gap: 1.2rem; }
  .sr-sec-head { flex-direction: column; align-items: flex-start; gap: 1rem; }
  .sr-hub { grid-template-columns: 1fr; }
  .sr-hub__cell + .sr-hub__cell { border-left: 0; border-top: 1px solid var(--sr-line); }
  .sr-hub__cell { min-height: 16rem; }
  .sr-page-head__row { flex-direction: column; align-items: flex-start; gap: 1rem; }
  .sr-skeleton { grid-template-columns: 1fr; }
}

@media (max-width: 599px) {
  .sr-services, .sr-grid, .sr-grid--2, .sr-grid--4 { grid-template-columns: 1fr; }
  .sr-service + .sr-service { border-left: 0; border-top: 1px solid var(--sr-line); }
  .sr-service:nth-child(n+2) { border-top: 1px solid var(--sr-line); }
  .sr-spec__row { grid-template-columns: 1fr; gap: 0.15rem; }
  .sr-footer__cols { grid-template-columns: 1fr; gap: 1.6rem; }
  .sr-hero__cta .sr-btn { width: 100%; justify-content: center; }
}

/* 降低动效偏好 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}