@charset "UTF-8";
/* ==========================================================================
   雅利资产 · 官网视觉系统 (site.css)
   设计语言：宣纸 / 墨 / 朱砂
   - 底色取宣纸暖白，文字取墨黑，唯一强调色取企业印章朱砂
   - 标题用宋体建立机构感，正文用黑体保证屏幕可读性
   - 版式：编号章节、细发丝线、非对称分栏、超大留白
   - 动效：仅 transform / opacity，cubic-bezier 缓动，尊重 reduced-motion
   ========================================================================== */

/* ---------------------------------------------------------------
   1. 设计令牌
   --------------------------------------------------------------- */
:root {
  /* 色板 */
  --paper: #f5f1e7;
  --paper-2: #efe9da;
  --paper-3: #e7dfcc;
  --ink: #15130f;
  --ink-2: #37322b;
  --ink-3: #5f5749;
  --ink-4: #70675a;
  --line: rgba(21, 19, 15, 0.13);
  --line-strong: rgba(21, 19, 15, 0.26);
  --seal: #a63b26;
  --seal-deep: #7d2a1a;
  --seal-wash: rgba(166, 59, 38, 0.08);
  --espresso: #14110d;
  --on-dark: #f2ede2;
  --on-dark-soft: rgba(242, 237, 226, 0.62);

  /* 字体 */
  --font-serif: "Songti SC", "Source Han Serif SC", "Noto Serif CJK SC",
    "Noto Serif SC", "STSong", "SimSun", serif;
  --font-sans: "PingFang SC", "HarmonyOS Sans SC", "Hiragino Sans GB",
    "Source Han Sans SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-latin: "Didot", "Bodoni 72", "Playfair Display", Georgia, "Times New Roman", serif;

  /* 字号 */
  --fs-display: clamp(2.6rem, 6.2vw, 5.6rem);
  --fs-h1: clamp(2.1rem, 4.4vw, 3.6rem);
  --fs-h2: clamp(1.55rem, 2.6vw, 2.45rem);
  --fs-h3: clamp(1.05rem, 1.3vw, 1.3rem);
  --fs-body: 1.0625rem;
  --fs-sm: 0.9375rem;
  --fs-xs: 0.8125rem;
  --fs-label: 0.6875rem;

  /* 版式尺度 */
  --wrap: 1200px;
  --wrap-wide: 1360px;
  --gutter: clamp(1.25rem, 4vw, 3.5rem);
  --section-y: clamp(4.5rem, 9vw, 8.5rem);

  /* 圆角 */
  --r-xs: 4px;
  --r-sm: 10px;
  --r-md: 18px;
  --r-lg: 28px;

  /* 动效 */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-soft: cubic-bezier(0.32, 0.72, 0, 1);
  --t-fast: 220ms;
  --t-mid: 480ms;
  --t-slow: 820ms;

  /* 层级 */
  --z-grain: 60;
  --z-nav: 50;
  --z-overlay: 45;
}

/* ---------------------------------------------------------------
   2. 基础重置与排版
   --------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 6rem;
}

body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.8;
  font-feature-settings: "kern";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* 宣纸底纹：极淡的双向渐变 + 纤维光斑，避免纯平色 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(120% 90% at 12% -10%, rgba(255, 255, 255, 0.85) 0%, rgba(255, 255, 255, 0) 58%),
    radial-gradient(90% 70% at 100% 8%, rgba(166, 59, 38, 0.05) 0%, rgba(166, 59, 38, 0) 60%),
    radial-gradient(80% 80% at 50% 120%, rgba(21, 19, 15, 0.05) 0%, rgba(21, 19, 15, 0) 62%);
}

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

a {
  color: inherit;
  text-decoration: none;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-serif);
  font-weight: 500;
  line-height: 1.22;
  letter-spacing: -0.01em;
  margin: 0;
  text-wrap: balance;
}

p {
  margin: 0 0 1.15em;
  text-wrap: pretty;
}

ul,
ol {
  margin: 0 0 1.2em;
  padding-left: 1.1em;
}

li {
  margin-bottom: 0.45em;
}

strong {
  font-weight: 600;
}

::selection {
  background: var(--seal);
  color: var(--on-dark);
}

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

/* 跳到主要内容 */
.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 100;
  padding: 0.75rem 1.25rem;
  background: var(--ink);
  color: var(--on-dark);
  border-radius: var(--r-xs);
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  transition: top var(--t-fast) var(--ease);
}

.skip-link:focus {
  top: 1rem;
}

/* 颗粒叠加层：固定在视口，不随滚动重绘 */
.grain {
  position: fixed;
  inset: 0;
  z-index: var(--z-grain);
  pointer-events: none;
  opacity: 0.32;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='240' height='240' filter='url(%23n)' opacity='0.16'/%3E%3C/svg%3E");
}

/* ---------------------------------------------------------------
   3. 布局工具
   --------------------------------------------------------------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
  position: relative;
  z-index: 1;
}

.wrap-wide {
  max-width: var(--wrap-wide);
}

.section {
  padding-block: var(--section-y);
  position: relative;
  z-index: 1;
}

.section--tight {
  padding-block: calc(var(--section-y) * 0.6);
}

.section--paper-2 {
  background: linear-gradient(180deg, rgba(239, 233, 218, 0) 0%, var(--paper-2) 18%, var(--paper-2) 82%, rgba(239, 233, 218, 0) 100%);
}

.rule {
  height: 1px;
  background: var(--line);
  border: 0;
  margin: 0;
}

/* ---------------------------------------------------------------
   4. 通用文字组件
   --------------------------------------------------------------- */
.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-sans);
  font-size: var(--fs-label);
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 0 0 1.4rem;
}

.eyebrow::before {
  content: "";
  width: 2.25rem;
  height: 1px;
  background: var(--seal);
  flex: none;
}

.eyebrow--seal {
  color: var(--seal);
}

.lede {
  font-size: clamp(1.05rem, 1.4vw, 1.22rem);
  line-height: 1.85;
  color: var(--ink-2);
  max-width: 58ch;
}

.serif-accent {
  font-family: var(--font-serif);
}

.num {
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum";
}

/* 章节序号：壹 / 02 */
.index-mark {
  font-family: var(--font-latin);
  font-size: var(--fs-xs);
  letter-spacing: 0.18em;
  color: var(--ink-4);
  font-variant-numeric: tabular-nums;
}

/* 印章标记 */
.seal-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.9rem;
  height: 2.9rem;
  border-radius: 50%;
  color: var(--seal);
  border: 1px solid rgba(166, 59, 38, 0.45);
  font-family: var(--font-serif);
  font-size: 1.05rem;
  letter-spacing: 0.02em;
  line-height: 1;
}

/* 按钮：内嵌圆圈箭头的双色结构 */
.btn {
  --btn-bg: var(--ink);
  --btn-fg: var(--on-dark);
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.7rem 0.7rem 0.7rem 1.5rem;
  border-radius: 999px;
  background: var(--btn-bg);
  color: var(--btn-fg);
  font-size: var(--fs-sm);
  letter-spacing: 0.06em;
  border: 0;
  cursor: pointer;
  transition: transform var(--t-fast) var(--ease-soft), background-color var(--t-fast) var(--ease);
}

.btn__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: rgba(245, 241, 231, 0.16);
  transition: transform var(--t-mid) var(--ease-soft), background-color var(--t-mid) var(--ease);
}

.btn:hover {
  background: var(--seal);
}

.btn:hover .btn__icon {
  transform: translate(2px, -2px);
  background: rgba(245, 241, 231, 0.22);
}

.btn:active {
  transform: scale(0.98);
}

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--ink);
  border: 1px solid var(--line-strong);
}

.btn--ghost .btn__icon {
  background: rgba(21, 19, 15, 0.06);
}

.btn--ghost:hover {
  --btn-fg: var(--on-dark);
  border-color: var(--seal);
}

/* 文字链：下划线由左向右拉开 */
.link-line {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--fs-sm);
  letter-spacing: 0.05em;
  color: var(--ink-2);
  padding-bottom: 2px;
  background-image: linear-gradient(var(--seal), var(--seal));
  background-repeat: no-repeat;
  background-size: 0% 1px;
  background-position: 0 100%;
  transition: background-size var(--t-mid) var(--ease), color var(--t-fast) var(--ease);
}

.link-line:hover {
  color: var(--seal);
  background-size: 100% 1px;
}

/* ---------------------------------------------------------------
   5. 顶部导航
   --------------------------------------------------------------- */
.site-head {
  position: fixed;
  inset: 0 0 auto;
  z-index: var(--z-nav);
  padding-top: 1.1rem;
  transition: padding var(--t-mid) var(--ease);
}

.site-head__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  width: 100%;
  max-width: var(--wrap-wide);
  margin-inline: auto;
  padding: 0.55rem 0.6rem 0.55rem 1.15rem;
  border-radius: 999px;
  border: 1px solid transparent;
  transition:
    max-width var(--t-mid) var(--ease),
    background-color var(--t-mid) var(--ease),
    border-color var(--t-mid) var(--ease),
    box-shadow var(--t-mid) var(--ease),
    padding var(--t-mid) var(--ease);
}

/* 滚动后收拢为悬浮胶囊 */
.site-head.is-stuck {
  padding-top: 0.7rem;
}

.site-head.is-stuck .site-head__inner {
  max-width: 1120px;
  background: rgba(245, 241, 231, 0.82);
  border-color: var(--line);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  box-shadow: 0 18px 40px -30px rgba(21, 19, 15, 0.55), inset 0 1px 0 rgba(255, 255, 255, 0.6);
  padding-left: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  flex: none;
}

.brand__seal {
  width: 2.1rem;
  height: 2.1rem;
  flex: none;
  color: var(--seal);
}

.brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand__cn {
  font-family: var(--font-serif);
  font-size: 1.14rem;
  letter-spacing: 0.18em;
}

.brand__en {
  font-family: var(--font-sans);
  font-size: 0.5rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--ink-4);
  margin-top: 0.28rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.nav__item {
  position: relative;
}

.nav__link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.55rem 0.72rem;
  border-radius: 999px;
  font-size: 0.875rem;
  letter-spacing: 0.05em;
  color: var(--ink-2);
  transition: color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
  white-space: nowrap;
}

.nav__link:hover,
.nav__item:hover > .nav__link {
  color: var(--ink);
  background: rgba(21, 19, 15, 0.045);
}

.nav__link[aria-current="page"],
.nav__item.is-current > .nav__link {
  color: var(--seal);
}

.nav__link[aria-current="page"] {
  background: var(--seal-wash);
}

.nav__caret {
  width: 0.42rem;
  height: 0.42rem;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: rotate(45deg) translateY(-1px);
  opacity: 0.55;
  transition: transform var(--t-fast) var(--ease);
}

.nav__item:hover .nav__caret {
  transform: rotate(45deg) translate(1px, 0);
}

/* 下拉：发丝线面板，非圆角卡片堆叠 */
.nav__panel {
  position: absolute;
  top: calc(100% + 0.55rem);
  left: 0;
  min-width: 13.5rem;
  padding: 0.5rem;
  background: rgba(248, 245, 237, 0.97);
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  box-shadow: 0 30px 60px -38px rgba(21, 19, 15, 0.55);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity var(--t-fast) var(--ease), transform var(--t-fast) var(--ease), visibility var(--t-fast);
}

.nav__item:hover .nav__panel,
.nav__item:focus-within .nav__panel {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav__panel a {
  display: block;
  padding: 0.5rem 0.7rem;
  border-radius: var(--r-xs);
  font-size: 0.875rem;
  color: var(--ink-2);
  transition: background-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

.nav__panel a:hover {
  background: var(--seal-wash);
  color: var(--seal-deep);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex: none;
}

.nav__mail {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.5rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--ink-2);
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}

.nav__mail:hover {
  border-color: var(--seal);
  color: var(--seal);
  background: var(--seal-wash);
}

/* 汉堡按钮 */
.burger {
  display: none;
  position: relative;
  width: 2.7rem;
  height: 2.7rem;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  background: transparent;
  cursor: pointer;
  flex: none;
  transition: border-color var(--t-fast) var(--ease), background-color var(--t-fast) var(--ease);
}

.burger span {
  position: absolute;
  left: 50%;
  width: 1.05rem;
  height: 1px;
  background: var(--ink);
  transform: translateX(-50%);
  transition: transform var(--t-mid) var(--ease-soft), opacity var(--t-fast) var(--ease), width var(--t-mid) var(--ease);
}

.burger span:nth-child(1) {
  top: 1.06rem;
}

.burger span:nth-child(2) {
  top: 1.34rem;
  width: 0.7rem;
  left: 0.68rem;
  transform: none;
}

.burger span:nth-child(3) {
  top: 1.62rem;
}

.burger:hover {
  border-color: var(--seal);
}

body.menu-open .burger span:nth-child(1) {
  transform: translateX(-50%) translateY(0.28rem) rotate(45deg);
}

body.menu-open .burger span:nth-child(2) {
  opacity: 0;
}

body.menu-open .burger span:nth-child(3) {
  transform: translateX(-50%) translateY(-0.28rem) rotate(-45deg);
}

/* 移动端全屏菜单 */
.menu-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-overlay);
  background: rgba(245, 241, 231, 0.97);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  padding: 6.5rem var(--gutter) 2.5rem;
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-1.2rem);
  transition: opacity var(--t-mid) var(--ease), transform var(--t-mid) var(--ease-soft), visibility var(--t-mid);
}

body.menu-open .menu-overlay {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.menu-overlay:focus {
  outline: none;
}

.menu-overlay__group + .menu-overlay__group {
  margin-top: 1.6rem;
  padding-top: 1.6rem;
  border-top: 1px solid var(--line);
}

.menu-overlay__sub {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.2rem;
  margin-top: 0.6rem;
}

.menu-overlay__sub a {
  font-size: 0.9rem;
  color: var(--ink-3);
}

.menu-overlay a.menu-overlay__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  font-family: var(--font-serif);
  font-size: 1.35rem;
  letter-spacing: 0.04em;
  padding-bottom: 0.35rem;
}

.menu-overlay__top span {
  font-family: var(--font-latin);
  font-size: 0.7rem;
  color: var(--ink-4);
  letter-spacing: 0.14em;
}

.menu-overlay a {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--t-mid) var(--ease), transform var(--t-mid) var(--ease-soft);
}

body.menu-open .menu-overlay a {
  opacity: 1;
  transform: translateY(0);
  transition-delay: calc(var(--i, 0) * 42ms + 80ms);
}

body.menu-open {
  overflow: hidden;
}

/* ---------------------------------------------------------------
   6. 首页
   --------------------------------------------------------------- */
.hero {
  position: relative;
  padding-top: clamp(7.5rem, 14vh, 11rem);
  padding-bottom: clamp(2rem, 3.5vw, 3rem);
  z-index: 1;
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: end;
}

.hero__title {
  font-size: var(--fs-display);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 0 0 1.5rem;
}

.hero__title em {
  font-style: normal;
  color: var(--seal);
}

.hero__title .thin {
  display: block;
  font-size: 0.34em;
  letter-spacing: 0.06em;
  color: var(--ink-3);
  margin-bottom: 1rem;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.6rem;
  margin-top: 2.2rem;
  padding-top: 1.4rem;
  border-top: 1px solid var(--line);
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  color: var(--ink-3);
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.9rem;
  margin-top: 2.2rem;
}

/* 双框（Doppelrand）图像 */
.frame {
  position: relative;
  padding: 0.55rem;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.5), rgba(21, 19, 15, 0.04));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.7);
}

.frame__inner {
  position: relative;
  overflow: hidden;
  border-radius: calc(var(--r-md) - 0.4rem);
  background: var(--paper-3);
  isolation: isolate;
}

.frame__inner img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  filter: grayscale(0.4) sepia(0.12) contrast(1.03);
  transform: scale(1.02);
  transition: transform 1.2s var(--ease), filter 1.2s var(--ease);
}

.frame:hover .frame__inner img {
  transform: scale(1.05);
  filter: grayscale(0) sepia(0.04) contrast(1.04);
}

.frame__inner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(21, 19, 15, 0.32) 0%, rgba(21, 19, 15, 0) 38%, rgba(21, 19, 15, 0.62) 100%);
  mix-blend-mode: multiply;
  pointer-events: none;
}

.frame__caption {
  position: absolute;
  left: 1.1rem;
  bottom: 1rem;
  z-index: 2;
  color: var(--on-dark);
  font-size: var(--fs-xs);
  letter-spacing: 0.12em;
}

.frame__tag {
  position: absolute;
  top: 1rem;
  left: 1.1rem;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.28rem 0.6rem;
  border-radius: 999px;
  border: 1px solid rgba(242, 237, 226, 0.45);
  color: var(--on-dark);
  font-size: 0.625rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

/* 竖排文字 */
.vertical-note {
  position: absolute;
  right: calc(var(--gutter) * -0.2);
  top: 50%;
  transform: translateY(-50%);
  writing-mode: vertical-rl;
  font-family: var(--font-serif);
  font-size: 0.8rem;
  letter-spacing: 0.5em;
  color: var(--ink-4);
  white-space: nowrap;
}

/* 事实条 */
.facts {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  margin: clamp(2.5rem, 5vw, 4rem) 0 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.facts__item {
  padding: 1.5rem 1.4rem 1.6rem;
  border-left: 1px solid var(--line);
}

.facts__item:first-child {
  border-left: 0;
  padding-left: 0;
}

.facts__k {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 2.6vw, 2.15rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
}

.facts__k small {
  font-size: 0.42em;
  letter-spacing: 0.12em;
  color: var(--ink-3);
  margin-left: 0.25rem;
}

.facts__v {
  margin: 0.5rem 0 0;
  font-size: var(--fs-xs);
  letter-spacing: 0.06em;
  color: var(--ink-3);
}

/* 章节标题行 */
.section-head {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: end;
  margin-bottom: clamp(2rem, 4vw, 3.2rem);
}

.section-head h2 {
  font-size: var(--fs-h2);
}

.section-head__aside {
  color: var(--ink-3);
  font-size: var(--fs-sm);
  line-height: 1.85;
  max-width: 46ch;
}

/* 业务索引列表 */
.biz-list {
  border-top: 1px solid var(--line-strong);
}

.biz-row {
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr) minmax(0, 1.35fr) 3rem;
  gap: 1.2rem 1.6rem;
  align-items: baseline;
  padding: 1.55rem 0.4rem;
  border-bottom: 1px solid var(--line);
  position: relative;
  transition: background-color var(--t-mid) var(--ease), padding var(--t-mid) var(--ease);
}

.biz-row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--seal);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--t-mid) var(--ease);
}

.biz-row:hover {
  background: linear-gradient(90deg, var(--seal-wash), rgba(166, 59, 38, 0) 62%);
}

.biz-row:hover::before {
  transform: scaleY(1);
}

.biz-row__no {
  font-family: var(--font-latin);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  color: var(--ink-4);
  font-variant-numeric: tabular-nums;
}

.biz-row__name {
  font-family: var(--font-serif);
  font-size: clamp(1.15rem, 1.7vw, 1.5rem);
  letter-spacing: 0.02em;
  transition: color var(--t-fast) var(--ease);
}

.biz-row__name small {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.625rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-4);
  margin-top: 0.4rem;
}

.biz-row__desc {
  font-size: var(--fs-sm);
  color: var(--ink-3);
  line-height: 1.75;
  margin: 0;
}

.biz-row:hover .biz-row__name {
  color: var(--seal-deep);
}

.biz-row__arrow {
  justify-self: end;
  align-self: center;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  font-size: 0.85rem;
  color: var(--ink-3);
  transition: transform var(--t-mid) var(--ease-soft), border-color var(--t-mid) var(--ease), color var(--t-mid) var(--ease), background-color var(--t-mid) var(--ease);
}

.biz-row:hover .biz-row__arrow {
  transform: translate(3px, -3px);
  border-color: var(--seal);
  color: var(--seal);
  background: rgba(245, 241, 231, 0.7);
}

/* 理念块：三条并列但不做等高卡片 */
.creed {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1.5rem, 3vw, 3rem);
}

.creed__item {
  padding-top: 1.3rem;
  border-top: 1px solid var(--line-strong);
}

.creed__item h3 {
  font-size: var(--fs-h3);
  margin-bottom: 0.6rem;
}

.creed__item p {
  margin: 0;
  font-size: var(--fs-sm);
  color: var(--ink-3);
  line-height: 1.8;
}

.creed__num {
  font-family: var(--font-latin);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--seal);
  display: block;
  margin-bottom: 0.85rem;
}

/* 合作机构墙 */
.partner-wall {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  border-top: 1px solid var(--line);
}

.partner-wall span {
  padding: 1.05rem 0.9rem;
  border-bottom: 1px solid var(--line);
  border-left: 1px solid var(--line);
  font-size: var(--fs-sm);
  color: var(--ink-2);
  letter-spacing: 0.04em;
  transition: background-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}

.partner-wall span:nth-child(4n + 1) {
  border-left: 0;
}

.partner-wall span:hover {
  background: var(--seal-wash);
  color: var(--seal-deep);
}

/* 引用 */
.pullquote {
  margin: 0;
  padding: 2rem 0 0;
  border-top: 1px solid var(--line-strong);
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 2.2vw, 1.85rem);
  line-height: 1.6;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.pullquote cite {
  display: block;
  margin-top: 1.1rem;
  font-family: var(--font-sans);
  font-style: normal;
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  color: var(--ink-4);
}

/* CTA 区块 */
.cta-band {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 140% at 88% 10%, rgba(166, 59, 38, 0.13) 0%, rgba(166, 59, 38, 0) 55%),
    linear-gradient(160deg, #fbf8f1 0%, var(--paper-2) 100%);
  padding: clamp(2.2rem, 5vw, 4rem);
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: 2rem;
  align-items: center;
}

.cta-band h2 {
  font-size: var(--fs-h2);
  margin-bottom: 0.9rem;
}

.cta-band p {
  margin: 0;
  color: var(--ink-3);
  font-size: var(--fs-sm);
  max-width: 46ch;
}

.cta-band__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  justify-content: flex-end;
}

/* ---------------------------------------------------------------
   7. 内页
   --------------------------------------------------------------- */
.page-head {
  padding-top: clamp(7rem, 13vh, 9.5rem);
  padding-bottom: clamp(1.8rem, 4vw, 3rem);
  position: relative;
  z-index: 1;
}

.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  font-size: var(--fs-xs);
  letter-spacing: 0.06em;
  color: var(--ink-4);
  margin-bottom: clamp(1.6rem, 3vw, 2.4rem);
}

.crumbs a {
  color: var(--ink-3);
  transition: color var(--t-fast) var(--ease);
}

.crumbs a:hover {
  color: var(--seal);
}

.crumbs span[aria-current] {
  color: var(--ink-2);
}

.crumbs i {
  font-style: normal;
  opacity: 0.5;
}

.page-title {
  font-size: var(--fs-h1);
  letter-spacing: -0.02em;
  margin-bottom: 1.1rem;
}

.page-head .lede {
  margin: 0;
}

.page-body {
  padding-bottom: var(--section-y);
}

.layout-2col {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 17.5rem;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}

/* 无侧栏页面：文字保持 66ch 行宽，宽组件（表格、流程图、机构墙）占满栏宽 */
.layout-single .prose {
  max-width: 100%;
}

.layout-single .prose > p,
.layout-single .prose > ul,
.layout-single .prose > ol,
.layout-single .prose > h2,
.layout-single .prose > h3,
.layout-single .prose > blockquote,
.layout-single .prose > .notice,
.layout-single .prose > .contact-list,
.layout-single .prose > .qr {
  max-width: 66ch;
}

/* 正文排版 */
.prose {
  max-width: 68ch;
  font-size: var(--fs-body);
  color: var(--ink-2);
}

.prose > p:first-of-type {
  font-size: clamp(1.06rem, 1.35vw, 1.18rem);
  color: var(--ink);
  line-height: 1.85;
}

.prose h2 {
  font-size: var(--fs-h2);
  margin: 2.6rem 0 1rem;
  color: var(--ink);
}

.prose h2:first-child {
  margin-top: 0;
}

.prose h3 {
  font-size: var(--fs-h3);
  margin: 2rem 0 0.7rem;
  color: var(--ink);
}

.prose ul,
.prose ol {
  padding-left: 1.15em;
  margin-bottom: 1.4em;
}

.prose li::marker {
  color: var(--seal);
}

.prose ul li::marker {
  content: "— ";
  font-size: 0.9em;
}

.prose blockquote {
  margin: 2rem 0;
  padding: 0 0 0 1.4rem;
  border-left: 1px solid var(--seal);
  font-family: var(--font-serif);
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--ink);
  font-style: normal;
}

.prose figure {
  margin: 2rem 0;
}

.prose figure img {
  border-radius: var(--r-sm);
  border: 1px solid var(--line);
}

.prose figcaption {
  margin-top: 0.7rem;
  font-size: var(--fs-xs);
  color: var(--ink-4);
  letter-spacing: 0.06em;
}

.prose hr {
  height: 1px;
  background: var(--line);
  border: 0;
  margin: 2.6rem 0;
}

/* 侧栏 */
.side-nav {
  position: sticky;
  top: 6.5rem;
  font-size: var(--fs-sm);
}

.side-nav__title {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  letter-spacing: 0.14em;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--line-strong);
  margin-bottom: 0.6rem;
}

.side-nav ul {
  list-style: none;
  margin: 0 0 2rem;
  padding: 0;
}

.side-nav li {
  margin: 0;
  border-bottom: 1px solid var(--line);
}

.side-nav li a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  padding: 0.68rem 0.2rem 0.68rem 0;
  color: var(--ink-3);
  transition: color var(--t-fast) var(--ease), padding-left var(--t-fast) var(--ease);
}

.side-nav li a::after {
  content: "↗";
  font-size: 0.72rem;
  opacity: 0;
  transform: translate(-4px, 2px);
  transition: opacity var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}

.side-nav li a:hover {
  color: var(--ink);
  padding-left: 0.35rem;
}

.side-nav li a:hover::after {
  opacity: 0.6;
  transform: translate(0, 0);
}

.side-nav li a[aria-current="page"] {
  color: var(--seal);
  padding-left: 0.7rem;
  box-shadow: inset 2px 0 0 var(--seal);
}

.side-card {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 1.3rem 1.25rem;
  background: linear-gradient(170deg, rgba(255, 255, 255, 0.55), rgba(21, 19, 15, 0.03));
}

.side-card h3 {
  font-size: 1rem;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

.side-card p {
  margin: 0;
  font-size: var(--fs-xs);
  line-height: 1.9;
  color: var(--ink-3);
}

.side-card .num {
  color: var(--ink);
}

/* 章节分隔 */
.chapter {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px solid var(--line-strong);
  margin-bottom: 1.6rem;
}

.chapter__no {
  font-family: var(--font-latin);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  color: var(--seal);
  font-variant-numeric: tabular-nums;
  flex: none;
}

.chapter h2 {
  font-size: var(--fs-h3);
  letter-spacing: 0.06em;
}

.chapter p {
  margin: 0;
  font-size: var(--fs-xs);
  color: var(--ink-4);
  letter-spacing: 0.08em;
  margin-left: auto;
}

/* 数据表 */
.spec {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-sm);
  margin: 1.2rem 0 2rem;
}

.spec th,
.spec td {
  text-align: left;
  padding: 0.85rem 0.9rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.spec th {
  font-weight: 500;
  color: var(--ink-3);
  width: 8.5rem;
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  background: rgba(21, 19, 15, 0.02);
}

.spec td {
  color: var(--ink-2);
}

/* 流程 / 结构图（CSS 绘制，随断点折叠） */
.flow {
  display: grid;
  gap: 0.9rem;
  margin: 1.6rem 0 2.4rem;
}

.flow__row {
  display: grid;
  grid-template-columns: repeat(var(--cols, 3), minmax(0, 1fr));
  gap: 0.9rem;
}

.flow__box {
  position: relative;
  border: 1px solid var(--line-strong);
  border-radius: var(--r-sm);
  background: linear-gradient(170deg, rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0.1));
  padding: 1rem 1.05rem;
  font-size: var(--fs-sm);
  line-height: 1.7;
}

.flow__box strong {
  display: block;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 1.02rem;
  letter-spacing: 0.04em;
  margin-bottom: 0.3rem;
}

.flow__box span {
  color: var(--ink-3);
  font-size: var(--fs-xs);
  line-height: 1.75;
  display: block;
}

.flow__box--accent {
  border-color: rgba(166, 59, 38, 0.45);
  background: var(--seal-wash);
}

.flow__box--accent strong {
  color: var(--seal-deep);
}

.flow__note {
  font-size: var(--fs-xs);
  color: var(--ink-4);
  letter-spacing: 0.06em;
  margin: -1.4rem 0 2.2rem;
}

/* 团队卡片 */
.people {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.4rem;
}

.person {
  border-top: 1px solid var(--line-strong);
  padding-top: 1.15rem;
}

.person h3 {
  font-size: 1.18rem;
  letter-spacing: 0.04em;
}

.person__role {
  display: block;
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  color: var(--seal);
  margin: 0.3rem 0 0.8rem;
}

.person p {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--ink-3);
}

/* 时间线（沿革/原则） */
.timeline {
  list-style: none;
  padding: 0;
  margin: 0;
}

.timeline li {
  position: relative;
  padding: 0 0 1.6rem 1.6rem;
  border-left: 1px solid var(--line);
  margin: 0;
}

.timeline li::before {
  content: "";
  position: absolute;
  left: -3.5px;
  top: 0.6rem;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--paper);
  border: 1px solid var(--seal);
}

.timeline b {
  display: block;
  font-family: var(--font-latin);
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--seal);
  margin-bottom: 0.25rem;
}

/* 招聘条目 */
.jobs {
  border-top: 1px solid var(--line-strong);
}

.job {
  border-bottom: 1px solid var(--line);
}

.job summary {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 1.25rem 0.2rem;
  cursor: pointer;
  list-style: none;
  transition: color var(--t-fast) var(--ease), padding-left var(--t-fast) var(--ease);
}

.job summary::-webkit-details-marker {
  display: none;
}

.job summary:hover {
  color: var(--seal-deep);
  padding-left: 0.4rem;
}

.job summary h3 {
  font-size: 1.1rem;
  letter-spacing: 0.03em;
  flex: 1;
}

.job__tag {
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  color: var(--ink-4);
  white-space: nowrap;
}

.job__plus {
  position: relative;
  width: 1rem;
  height: 1rem;
  flex: none;
  align-self: center;
}

.job__plus::before,
.job__plus::after {
  content: "";
  position: absolute;
  background: currentColor;
  transition: transform var(--t-mid) var(--ease-soft), opacity var(--t-fast) var(--ease);
}

.job__plus::before {
  left: 0;
  top: 50%;
  width: 100%;
  height: 1px;
}

.job__plus::after {
  top: 0;
  left: 50%;
  height: 100%;
  width: 1px;
}

.job[open] .job__plus::after {
  transform: scaleY(0);
  opacity: 0;
}

.job__body {
  padding: 0 0.2rem 1.8rem;
  font-size: var(--fs-sm);
  color: var(--ink-3);
  max-width: 70ch;
  animation: jobIn var(--t-mid) var(--ease);
}

.job__body h4 {
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  color: var(--ink);
  margin: 1.2rem 0 0.4rem;
}

.job__body ul {
  margin-bottom: 0.8rem;
}

@keyframes jobIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 联系页 */
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: clamp(2rem, 4vw, 4rem);
  align-items: start;
}

.contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-strong);
}

.contact-list li {
  display: grid;
  grid-template-columns: 6rem minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
  font-size: var(--fs-sm);
  margin: 0;
}

.contact-list dt,
.contact-list .k {
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  color: var(--ink-4);
  padding-top: 0.15rem;
}

.contact-list .v {
  color: var(--ink);
}

.contact-list a.v:hover {
  color: var(--seal);
}

.qr {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 0 0;
}

.qr img {
  width: 96px;
  height: 96px;
  border-radius: var(--r-xs);
  border: 1px solid var(--line);
  background: #fff;
  padding: 4px;
}

.qr p {
  margin: 0;
  font-size: var(--fs-xs);
  color: var(--ink-3);
  line-height: 1.8;
}

/* 免责声明 / 风险提示 */
.notice {
  border-left: 2px solid var(--seal);
  background: linear-gradient(90deg, var(--seal-wash), rgba(166, 59, 38, 0));
  padding: 1.2rem 1.4rem;
  font-size: var(--fs-xs);
  line-height: 1.95;
  color: var(--ink-3);
  border-radius: 0 var(--r-xs) var(--r-xs) 0;
}

.notice strong {
  color: var(--ink);
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 0.35rem;
}

/* ---------------------------------------------------------------
   8. 页脚
   --------------------------------------------------------------- */
.site-foot {
  position: relative;
  z-index: 1;
  margin-top: clamp(3rem, 7vw, 6rem);
  background: var(--espresso);
  color: var(--on-dark-soft);
  padding-block: clamp(3rem, 6vw, 5rem) 1.6rem;
  overflow: hidden;
}

.site-foot::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(90% 120% at 12% 0%, rgba(166, 59, 38, 0.22) 0%, rgba(166, 59, 38, 0) 55%);
  pointer-events: none;
}

.site-foot .wrap {
  position: relative;
}

.foot-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr) minmax(0, 0.7fr) minmax(0, 0.9fr);
  gap: clamp(1.6rem, 3vw, 3rem);
  padding-bottom: 2.6rem;
  border-bottom: 1px solid rgba(242, 237, 226, 0.14);
}

.foot-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.foot-brand .brand__seal {
  color: #d98a6f;
}

.foot-brand .brand__cn {
  color: var(--on-dark);
}

.foot-brand .brand__en {
  color: rgba(242, 237, 226, 0.42);
}

.foot-about {
  font-size: var(--fs-sm);
  line-height: 1.9;
  margin: 0 0 1rem;
  max-width: 30ch;
}

.foot-col h4 {
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  letter-spacing: 0.2em;
  color: rgba(242, 237, 226, 0.55);
  margin: 0 0 1rem;
  font-weight: 400;
}

.foot-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.foot-col li {
  margin: 0 0 0.55rem;
  font-size: var(--fs-sm);
}

.foot-col a {
  color: var(--on-dark-soft);
  transition: color var(--t-fast) var(--ease);
}

.foot-col a:hover {
  color: var(--on-dark);
}

.foot-contact dl {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.9;
}

.foot-contact dt {
  color: rgba(242, 237, 226, 0.45);
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  margin-top: 0.7rem;
}

.foot-contact dd {
  margin: 0;
}

.foot-contact a:hover {
  color: var(--on-dark);
}

.foot-legal {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.8rem 1.6rem;
  padding-top: 1.4rem;
  font-size: var(--fs-xs);
  color: rgba(242, 237, 226, 0.45);
  letter-spacing: 0.05em;
}

.foot-legal a {
  color: inherit;
  border-bottom: 1px solid rgba(242, 237, 226, 0.22);
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}

.foot-legal a:hover {
  color: var(--on-dark);
  border-color: var(--on-dark);
}

.foot-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
}

/* 回到顶部 */
.to-top {
  position: fixed;
  right: clamp(1rem, 3vw, 2.4rem);
  bottom: clamp(1rem, 3vw, 2rem);
  z-index: var(--z-nav);
  width: 2.75rem;
  height: 2.75rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--line-strong);
  background: rgba(245, 241, 231, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--ink-2);
  font-size: 0.8rem;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--t-mid) var(--ease), transform var(--t-mid) var(--ease-soft), visibility var(--t-mid), border-color var(--t-fast) var(--ease);
}

.to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.to-top:hover {
  border-color: var(--seal);
  color: var(--seal);
}

/* ---------------------------------------------------------------
   9. 进场动效
   --------------------------------------------------------------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  filter: blur(4px);
  transition:
    opacity var(--t-slow) var(--ease),
    transform var(--t-slow) var(--ease-soft),
    filter var(--t-slow) var(--ease);
  transition-delay: calc(var(--reveal-delay, 0) * 1ms);
}

html.js [data-reveal].is-in {
  opacity: 1;
  transform: translateY(0);
  filter: blur(0);
}

/* 标题逐行揭幕 */
.reveal-lines {
  display: block;
}

.reveal-lines > span {
  display: block;
  overflow: hidden;
}

.reveal-lines > span > span {
  display: block;
  transform: translateY(102%);
  transition: transform 1000ms var(--ease-soft);
  transition-delay: calc(var(--i, 0) * 110ms + 120ms);
}

.is-in .reveal-lines > span > span,
.reveal-lines.is-in > span > span {
  transform: translateY(0);
}

/* ---------------------------------------------------------------
   10. 响应式
   --------------------------------------------------------------- */
@media (max-width: 1180px) {
  .foot-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr) minmax(0, 0.9fr);
  }

  .foot-col:nth-child(3) {
    display: none;
  }
}

@media (max-width: 1024px) {
  .site-head__inner {
    background: rgba(245, 241, 231, 0.86);
    border-color: var(--line);
    backdrop-filter: blur(16px) saturate(140%);
    -webkit-backdrop-filter: blur(16px) saturate(140%);
  }

  .nav {
    display: none;
  }

  .burger {
    display: block;
  }

  .nav__mail {
    display: none;
  }

  .hero__grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 2.5rem;
  }

  .hero__figure {
    order: -1;
    max-width: 30rem;
  }

  .frame__inner img {
    aspect-ratio: 16 / 11;
  }

  .vertical-note {
    display: none;
  }

  .layout-2col {
    grid-template-columns: minmax(0, 1fr);
  }

  .side-nav {
    position: static;
    order: -1;
  }

  .side-nav ul {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    border: 0;
  }

  .side-nav li {
    border: 1px solid var(--line);
    border-radius: 999px;
  }

  .side-nav li a {
    padding: 0.35rem 0.85rem;
    font-size: var(--fs-xs);
  }

  .side-nav ul {
    margin-bottom: 0.5rem;
  }

  .side-nav__title {
    margin-bottom: 0.85rem;
  }

  .side-nav li a[aria-current="page"] {
    padding-left: 0.85rem;
    background: var(--seal-wash);
    box-shadow: none;
  }

  .side-nav li a::after {
    content: none;
  }

  .side-card {
    display: none;
  }

  .facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .facts__item:nth-child(3) {
    border-left: 0;
    padding-left: 0;
  }

  .facts__item:nth-child(n + 3) {
    border-top: 1px solid var(--line);
  }

  .partner-wall {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .partner-wall span:nth-child(4n + 1) {
    border-left: 1px solid var(--line);
  }

  .partner-wall span:nth-child(3n + 1) {
    border-left: 0;
  }

  .creed,
  .people,
  .contact-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .cta-band {
    grid-template-columns: minmax(0, 1fr);
  }

  .cta-band__actions {
    justify-content: flex-start;
  }
}

@media (max-width: 860px) {
  .biz-row {
    grid-template-columns: 2.6rem minmax(0, 1fr) 2.2rem;
    gap: 0.5rem 1rem;
    padding: 1.25rem 0.2rem;
  }

  .biz-row__desc {
    grid-column: 2 / -1;
    grid-row: 2;
    font-size: var(--fs-xs);
  }

  .biz-row__arrow {
    grid-row: 1;
    grid-column: 3;
  }

  .section-head {
    grid-template-columns: minmax(0, 1fr);
    gap: 1rem;
  }

  .section-head__aside {
    max-width: 60ch;
  }

  .flow__row {
    grid-template-columns: minmax(0, 1fr);
  }

  .foot-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

  .foot-col:nth-child(3) {
    display: block;
  }
}

@media (max-width: 640px) {
  :root {
    --fs-body: 1rem;
    --section-y: 3.75rem;
  }

  .site-head__inner {
    padding-left: 0.85rem;
  }

  .brand__cn {
    font-size: 1.02rem;
    letter-spacing: 0.14em;
  }

  .brand__en {
    letter-spacing: 0.22em;
  }

  .facts {
    grid-template-columns: minmax(0, 1fr);
  }

  .facts__item {
    padding: 1.1rem 0;
    border-left: 0;
  }

  .facts__item + .facts__item {
    border-top: 1px solid var(--line);
  }

  .partner-wall {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .partner-wall span:nth-child(3n + 1) {
    border-left: 1px solid var(--line);
  }

  .partner-wall span:nth-child(2n + 1) {
    border-left: 0;
  }

  .spec th {
    width: 5.5rem;
  }

  .contact-list li {
    grid-template-columns: 4.5rem minmax(0, 1fr);
  }

  .foot-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .foot-legal {
    flex-direction: column;
    align-items: flex-start;
  }

  .to-top {
    width: 2.4rem;
    height: 2.4rem;
  }
}

/* ---------------------------------------------------------------
   11. 可达性与降级
   --------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
    filter: none;
  }

  .reveal-lines > span > span {
    transform: none;
  }

  html.js [data-reveal],
  [data-reveal] {
    opacity: 1;
    transform: none;
    filter: none;
  }
}

@media print {
  .site-head,
  .menu-overlay,
  .to-top,
  .grain,
  .site-foot::before {
    display: none;
  }

  body {
    background: #fff;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
    filter: none;
  }
}