/* ==========================================================================
   得塔云 DELTACLOUD · 风电智能运维 AI Agent 官网
   设计令牌 + 全站样式
   ========================================================================== */

/* ---------------------------------- 令牌 --------------------------------- */
:root {
  --cream:        #F4F1EC;
  --cream-alt:    #EFEBE3;
  --card:         #FBFAF7;
  --grid-line:    #E7E2D9;
  --line:         #DED8CE;
  --line-soft:    #E4DFD6;
  --ink:          #10151B;
  --ink-foot:     #C9CFD6;
  --body:         #3A424C;
  --muted:        #6E7681;
  --muted-2:      #8A9199;
  --dark-line:    #262D36;
  --dark-text:    #9AA2AC;

  --green:        #1F5C4B;
  --green-light:  #7FA99B;
  --green-pale:   #C9D6CF;
  --slot-frame:   #EDE9E1;

  --sans:  'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --serif: 'Noto Serif SC', Georgia, serif;
  --mono:  'IBM Plex Mono', ui-monospace, SFMono-Regular, monospace;

  --wrap: 1280px;
  --pad: 56px;
}

/* ---------------------------------- 基础 --------------------------------- */
* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--green); text-decoration: none; }
a:hover { color: var(--ink); }
::selection { background: var(--green); color: var(--cream); }

/* 原始版本在每处段落上都写了 margin:0，这里统一重置，避免浏览器默认的
   1em 上下边距把卡片撑高（每张卡会多出约 29px）。 */
p, h1, h2, h3, h4, h5, h6, dl, dd, dt, figure, blockquote { margin: 0; }

@keyframes rise {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}

/* ------------------------------- 排版原子类 ------------------------------ */
.h1 {
  font-family: var(--serif);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: .01em;
  margin: 0;
}
.h1--home      { font-size: 64px; margin-bottom: 30px; }
.h1--solutions { font-size: 56px; line-height: 1.22; margin-bottom: 24px; }
.h1--about     { font-size: 52px; }

.h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 38px;
  letter-spacing: .03em;
  margin: 0;
}
.h2--sm { font-size: 34px; letter-spacing: 0; }

.h3 {
  font-family: var(--serif);
  font-weight: 500;
  margin: 0 0 14px;
  font-size: 21px;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .28em;
  color: var(--green);
}
.eyebrow--section { letter-spacing: .24em; font-size: 12px; }
.eyebrow--dark    { color: var(--green-light); }

.lede {
  font-size: 16.5px;
  line-height: 2;
  color: var(--body);
  margin: 0;
}
.copy {
  font-size: 15.5px;
  line-height: 2;
  color: var(--body);
  margin: 0;
}
.copy--sm { font-size: 14.5px; line-height: 1.95; }
.muted    { color: var(--muted); }

.pull {
  font-family: var(--serif);
  font-size: 21px;
  line-height: 1.75;
  border-left: 3px solid var(--green);
  padding-left: 26px;
  max-width: 900px;
  margin: 52px 0 0;
}
.pull--tight { font-size: 22px; margin: 44px 0 0; }

/* --------------------------------- 布局 ---------------------------------- */
.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 var(--pad); }
.section { border-bottom: 1px solid var(--line); }
.section--alt { background: var(--cream-alt); }
.section--dark { background: var(--ink); color: var(--cream); border-bottom: 0; }
.section--grid-lines {
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 96px 96px;
}
.section--grid-lines-center { background-position: center; }

.pad-lg { padding: 108px var(--pad); }
.pad-md { padding: 100px var(--pad); }
.pad-sm { padding: 96px 0 84px; }

/* 区块标题行：左标题 + 右英文标签
   标题与下方内容的间距在原始版本中有 44 / 20 / 52 三档 */
.rule-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 22px;
  margin-bottom: 44px;
}
.rule-head--tight { margin-bottom: 20px; }
.rule-head--loose { margin-bottom: 52px; }
.rule-head .tag {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .26em;
  color: var(--muted);
  white-space: nowrap;
}

/* ------------------------------ 网格 & 卡片 ------------------------------- */
.grid {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}
.grid--2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid--3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid--4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid--gap { gap: 40px; background: none; border: 0; }

.cell { background: var(--card); }
.cell--pad-a { padding: 38px 32px 42px; }
.cell--pad-b { padding: 34px 30px 38px; }
.cell--pad-c { padding: 36px 30px 40px; }
.cell--pad-d { padding: 34px 28px 38px; }
.cell--pad-e { padding: 28px 24px 32px; }
.cell--pad-f { padding: 36px 28px 40px; }
.cell--pad-g { padding: 30px 26px 34px; }
.cell--pad-h { padding: 36px 32px 40px; }
.cell--pad-i { padding: 24px 22px 26px; }
.cell--pad-j { padding: 34px 30px; }
.cell--hover:hover { background: #FFFFFF; }

.num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--green);
  margin-bottom: 20px;
}

/* 内嵌分隔线的卡片列表 */
.cell-list {
  border-top: 1px solid var(--line-soft);
  padding-top: 18px;
  display: grid;
  gap: 9px;
  font-size: 14px;
  color: var(--body);
}
.cell-list--mid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 18px;
  font-size: 14px;
  color: var(--body);
  border-top: 1px solid var(--line-soft);
  padding-top: 18px;
}

/* 顶部粗线的三栏条目 */
.rule-item {
  border-top: 2px solid var(--ink);
  padding-top: 22px;
}
.rule-item h4 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 18px;
  margin: 0 0 10px;
}
.rule-item p {
  font-size: 14px;
  line-height: 1.9;
  color: var(--body);
  margin: 0;
}

/* ------------------------------- 页头 / 导航 ------------------------------ */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(244, 241, 236, .93);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header__inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--pad);
  height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 13px;
  cursor: pointer;
  background: none;
  border: 0;
  padding: 0;
  font: inherit;
  color: inherit;
}
.brand__logo {
  height: 34px;
  width: auto;
  display: block;
}

.nav { display: flex; align-items: center; gap: 38px; }
.nav__link {
  background: none;
  border: 0;
  padding: 0 0 3px;
  font: inherit;
  font-size: 14.5px;
  letter-spacing: .06em;
  color: inherit;
  cursor: pointer;
  border-bottom: 1px solid transparent;
  transition: border-color .15s;
}
.nav__link:hover { border-bottom-color: var(--green); }
.nav__cta {
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 20px;
  background: var(--ink);
  color: var(--cream);
  font: inherit;
  font-size: 13.5px;
  letter-spacing: .08em;
  border: 0;
  cursor: pointer;
  transition: background .15s;
}
.nav__cta:hover { background: var(--green); }

/* --------------------------- 解决方案下拉菜单 --------------------------- */
.nav-drop { position: relative; display: inline-flex; }
.nav-drop__btn { display: inline-flex; align-items: center; gap: 6px; }
.nav-drop__caret {
  font-size: 10px;
  color: var(--muted);
  transition: transform .15s;
}
.nav-drop.open .nav-drop__caret { transform: rotate(180deg); }
.nav-drop__menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  min-width: 184px;
  background: var(--cream);
  border: 1px solid var(--line);
  box-shadow: 0 14px 34px rgba(16, 21, 27, .14);
  padding: 10px 8px 8px;
  display: none;
  z-index: 80;
}
.nav-drop.open .nav-drop__menu { display: grid; gap: 4px; }
.nav-drop__item {
  display: block;
  width: 100%;
  text-align: left;
  background: none;
  border: 0;
  padding: 12px 16px;
  font: inherit;
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--ink);
  cursor: pointer;
}
.nav-drop__item:hover { background: var(--cream-alt); color: var(--green); }

/* --------------------------------- 按钮 ---------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  height: 52px;
  padding: 0 30px;
  font: inherit;
  font-size: 14.5px;
  letter-spacing: .1em;
  border: 0;
  cursor: pointer;
  transition: background .15s, color .15s;
}
.btn--solid { background: var(--ink); color: var(--cream); }
.btn--solid:hover { background: var(--green); }
.btn--ghost { background: transparent; color: var(--ink); border: 1px solid var(--ink); }
.btn--ghost:hover { background: var(--ink); color: var(--cream); }
.btn--green { background: var(--green); color: var(--cream); white-space: nowrap; height: 54px; padding: 0 34px; }
.btn--green:hover { background: var(--cream); color: var(--ink); }
.btn-row { display: flex; gap: 14px; flex-wrap: wrap; }

/* --------------------------------- Hero ---------------------------------- */
.hero {
  border-bottom: 1px solid var(--line);
}
.hero__inner {
  max-width: var(--wrap);
  margin: 0 auto;
  display: grid;
  gap: 64px;
  align-items: end;
  animation: rise .6s ease both;
}
.hero--home .hero__inner { max-width: 1440px; padding: 104px var(--pad) 92px; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr); }
.hero--solutions .hero__inner { padding: 96px var(--pad) 84px; grid-template-columns: minmax(0, 1fr); animation-duration: .5s; }
.hero--about .hero__inner { padding: 96px var(--pad) 84px; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 72px; align-items: center; animation-duration: .5s; }

.hero__eyebrow { margin-bottom: 28px; }
.hero--solutions .hero__eyebrow,
.hero--about .hero__eyebrow { margin-bottom: 24px; }
.hero__sub { max-width: 560px; margin: 0 0 24px; }
.hero--solutions .hero__sub { max-width: 780px; margin: 0; }
.hero__actions { margin-top: 40px; }
.hero--home .hero__actions { margin-top: 0; }

.hero__media {
  position: relative;
  min-width: 0;
  aspect-ratio: 3175 / 2196; /* 与宣传单页图同比例：完整显示不裁边 */
  border: 1px solid var(--line);
  background: var(--slot-frame);
}

.pill-row {
  display: flex;
  gap: 26px;
  flex-wrap: wrap;
  margin-top: 36px;
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--green);
}
.dot-sep { color: var(--green-light); }

/* -------------------------------- 指标条 --------------------------------- */
.metrics {
  background: var(--ink);
  color: var(--cream);
}
.metrics__inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--pad);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}
.metric { padding: 52px 30px; border-right: 1px solid var(--dark-line); }
.metric:first-child { padding-left: 0; }
.metric:last-child { padding-right: 0; border-right: 0; }
.metric__value { font-family: var(--serif); font-size: 42px; line-height: 1; white-space: nowrap; }
.metric__value span { color: var(--green-light); }
.metric__label {
  font-size: 13.5px;
  letter-spacing: .06em;
  color: var(--dark-text);
  margin-top: 12px;
  line-height: 1.7;
}

/* ------------------------------ 三层架构卡片 ------------------------------ */
.arch__num { margin-bottom: 8px; }
.arch__sub { font-size: 13px; color: var(--muted); margin-bottom: 22px; }
.arch__title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 22px;
  margin: 0 0 16px;
}
.arch__desc { font-size: 14.5px; line-height: 1.95; color: var(--body); margin: 0 0 22px; }

.figure-block {
  margin-top: 40px;
  border: 1px solid var(--line);
  background: var(--card);
  padding: 34px 32px;
}
.figure-block__cap {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .24em;
  color: var(--green);
  margin-bottom: 16px;
}
.figure-block__media { min-width: 0; aspect-ratio: 7510 / 2470; border: 1px solid var(--line); }

/* ----------------------------- 智能体能力矩阵 ----------------------------- */
.matrix__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 8px;
}
.matrix__count { font-family: var(--serif); font-size: 22px; }
.matrix__sub { font-size: 13px; color: var(--muted); margin-bottom: 24px; }
.matrix__list {
  display: grid;
  gap: 16px;
  border-top: 1px solid var(--line-soft);
  padding-top: 20px;
}
.matrix__item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}
.badge {
  font-family: var(--mono);
  font-size: 11px;
  padding: 2px 0;
  text-align: center;
  border: 1px solid var(--green-pale);
  color: var(--green);
}
.badge--p1 { border-color: var(--line); color: var(--muted-2); }
.matrix__name { font-size: 15px; }
.matrix__note { font-size: 13px; color: var(--muted); margin-top: 3px; }

.crossbar {
  margin-top: 24px;
  border: 1px solid var(--line);
  background: var(--card);
  padding: 22px 26px;
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
}
.crossbar__label {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .2em;
  color: var(--green);
}
.crossbar__item { font-size: 14.5px; color: var(--body); }
.crossbar__sep { color: var(--line); }

/* ------------------------------- 测点 / 故障 ------------------------------ */
.measure__code {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--green);
  margin-bottom: 12px;
}
.measure__name { font-size: 15px; }

.fault-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
  margin-top: 56px;
}
.fault-card {
  border: 1px solid var(--line);
  padding: 32px 28px 34px;
  background: var(--card);
}
.fault-card__head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 20px;
}
.fault-card__head h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 21px;
  margin: 0;
}
.fault-card__meta {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;
}

/* -------------------------------- 诊断闭环 ------------------------------- */
.loop {
  margin-top: 52px;
  padding: 36px 34px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--cream);
}
.loop__label {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .24em;
  color: var(--green-light);
  margin-bottom: 24px;
}
.loop__chain {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
  font-family: var(--serif);
  font-size: 22px;
}
.loop__arrow { color: var(--green-light); }
.loop__body { font-size: 14.5px; line-height: 1.95; color: var(--dark-text); margin: 24px 0 0; max-width: 860px; }
.loop__foot { font-size: 13.5px; line-height: 1.9; color: var(--muted); margin: 20px 0 0; }

/* -------------------------------- 成果应用 ------------------------------- */
.cases { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 40px; margin-bottom: 40px; }
.cases:last-child { margin-bottom: 0; }
.case {
  border: 1px solid var(--line);
  background: var(--card);
}
.case--txt { padding: 34px 32px 38px; }
.case__media { min-width: 0; aspect-ratio: 2 / 1; border-bottom: 1px solid var(--line); }
.case__body { padding: 34px 32px 38px; }
.case__eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .2em;
  color: var(--green);
  margin-bottom: 16px;
}
.case__title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 23px;
  margin: 0 0 14px;
}
.case--txt .case__title { font-size: 21px; }
.case__text { font-size: 14.5px; line-height: 1.95; color: var(--body); margin: 0; }
.case:not(.case--txt) .case__text { margin-bottom: 24px; }
.case__foot {
  border-top: 1px solid var(--line-soft);
  padding-top: 20px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--muted);
}

/* -------------------------------- CTA 区 --------------------------------- */
.cta {
  background: var(--ink);
  color: var(--cream);
}
.cta__inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 92px var(--pad);
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 56px;
  align-items: center;
}
.cta__eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .24em;
  color: var(--green-light);
  margin-bottom: 18px;
}
.cta__title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 38px;
  letter-spacing: .03em;
  margin: 0 0 18px;
}
.cta--solutions .cta__title { font-size: 36px; }
.cta__text { font-size: 15.5px; line-height: 1.95; color: var(--dark-text); max-width: 680px; margin: 0; }

/* ------------------------------ Agent OS 页 ------------------------------ */
.os-flow {
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--cream);
  padding: 34px 32px;
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  font-family: var(--serif);
  font-size: 20px;
}
.os-flow__arrow { color: var(--green-light); }
.os-flow__tail {
  font-family: var(--sans);
  font-size: 14px;
  color: var(--dark-text);
  margin-left: auto;
}
.lifecycle__name { font-size: 16px; margin-bottom: 8px; }
.lifecycle__note { font-size: 13.5px; color: var(--muted); line-height: 1.8; }
.lifecycle__foot { margin-top: 20px; font-size: 14px; color: var(--muted); }

/* ------------------------------- AI Box 双栏 ------------------------------ */
.duo {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}
.panel {
  border: 1px solid var(--line);
  background: var(--card);
  padding: 36px 32px 40px;
}
.panel--dark {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--cream);
}
.panel__label {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .2em;
  color: var(--green);
  margin-bottom: 24px;
}
.panel--dark .panel__label { color: var(--green-light); }
.panel__rows { display: grid; gap: 22px; }
.panel__row {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 20px;
  align-items: baseline;
}
.panel__row dt { font-family: var(--serif); font-size: 19px; margin: 0; }
.panel__row dd { font-size: 14.5px; line-height: 1.9; color: var(--body); margin: 0; }
.panel--dark .panel__row dd { color: var(--dark-text); }
.panel__foot {
  border-top: 1px solid var(--line-soft);
  margin-top: 28px;
  padding-top: 22px;
  font-size: 14px;
  line-height: 1.95;
  color: var(--muted);
}
.panel--dark .panel__foot { border-top-color: var(--dark-line); color: var(--dark-text); }

.role__name { font-size: 17px; margin-bottom: 6px; }
.role__desc { font-size: 14px; color: var(--dark-text); line-height: 1.9; }

/* ------------------------------ 算法 / 优势 ------------------------------- */
/* 原始版本：max-width 1280 + 居中 + 上下 100px 内边距，左右交给 .wrap */
.split {
  max-width: var(--wrap);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr);
  gap: 72px;
  align-items: center;
}
.split__label {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .24em;
  color: var(--green);
  margin-bottom: 20px;
}
.split__title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 33px;
  margin: 0 0 20px;
}
.split__text { font-size: 15.5px; line-height: 2; color: var(--body); margin: 0 0 30px; }
.split__list {
  display: grid;
  gap: 24px;
  border-top: 1px solid var(--line);
  padding-top: 26px;
}
.split__item-title { font-family: var(--serif); font-size: 19px; margin-bottom: 10px; }
.split__item-text { font-size: 14.5px; line-height: 1.95; color: var(--body); margin: 0; }
.split__foot {
  margin-top: 26px;
  border-top: 1px solid var(--line);
  padding-top: 20px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--muted);
}
.split__media {
  min-width: 0;
  aspect-ratio: 16 / 9; /* 截图均为 16:9，完整铺满 */
  border: 1px solid var(--line);
  background: var(--card);
}

/* -------------------------------- 智能体卡 ------------------------------- */
.agent__eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .2em;
  color: var(--green);
  margin-bottom: 20px;
}
.agent__name {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 20px;
  margin: 0 0 20px;
}
.agent__list {
  display: grid;
  gap: 10px;
  font-size: 14px;
  color: var(--body);
  border-top: 1px solid var(--line-soft);
  padding-top: 18px;
}

.adv h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 21px;
  margin: 0 0 14px;
}
.adv p { font-size: 14.5px; line-height: 1.95; color: var(--body); margin: 0; }
.adv__num {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .2em;
  color: var(--green);
  margin-bottom: 18px;
}

/* -------------------------------- 关于我们 ------------------------------- */
.philosophy__inner { max-width: var(--wrap); margin: 0 auto; padding: 76px var(--pad); }
.philosophy__label {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .24em;
  color: var(--green-light);
  margin-bottom: 28px;
}
.philosophy__row {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  font-family: var(--serif);
  font-size: 26px;
  line-height: 1.6;
}
.philosophy__sep { color: var(--green-light); }
.philosophy__text {
  font-size: 15px;
  line-height: 1.95;
  color: var(--dark-text);
  margin: 28px 0 0;
  max-width: 900px;
}

.cert { padding: 34px 30px; }
.cert h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 19px;
  margin: 0 0 10px;
}
.cert p { font-size: 14px; color: var(--muted); margin: 0; }

.status__num {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .2em;
  color: var(--green);
  margin-bottom: 18px;
}
.status h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 19px;
  margin: 0 0 12px;
}
.status p { font-size: 14px; line-height: 1.9; color: var(--body); margin: 0; }

.jobs { display: grid; border-top: 1px solid var(--line); }
.job {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 180px 140px 40px;
  gap: 24px;
  align-items: center;
  padding: 26px 6px;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  transition: background .15s;
}
.job:hover { background: var(--card); }
.job__title { font-family: var(--serif); font-size: 19px; }
.job__meta { font-size: 14px; color: var(--muted); }
.job__arrow { color: var(--green); text-align: right; }

.contact__label {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .24em;
  color: var(--green-light);
  margin-bottom: 18px;
}
.contact__title {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 36px;
  margin: 0 0 18px;
}
.contact__text { font-size: 15.5px; line-height: 1.95; color: var(--dark-text); margin: 0 0 26px; }
.contact__list { display: grid; gap: 16px; font-size: 14.5px; line-height: 1.9; color: var(--ink-foot); }
.contact__key { color: var(--green-light); }
.contact__info { display: grid; gap: 22px; align-content: start; }
.contact__field { border-top: 1px solid var(--dark-line); padding-top: 18px; }
.contact__field dt {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .24em;
  color: var(--muted);
  margin-bottom: 10px;
}
.contact__field dd { font-size: 16px; margin: 0; }
.contact__field dd.dim { color: var(--dark-text); }

.about-split {
  max-width: var(--wrap);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 64px;
}
.about-split .contact__title { margin-bottom: 18px; }

/* --------------------------------- 页脚 ---------------------------------- */
.footer {
  background: var(--ink);
  color: var(--cream);
  border-top: 1px solid var(--dark-line);
}
.footer__inner { max-width: var(--wrap); margin: 0 auto; padding: 72px var(--pad) 36px; }
.footer__cols {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: 48px;
  padding-bottom: 52px;
  border-bottom: 1px solid var(--dark-line);
}
.footer__brand { display: flex; align-items: center; gap: 12px; margin-bottom: 22px; }
.footer__brand .brand__logo { height: 30px; }
.brand__logo--footer { filter: brightness(0) invert(1); }
.footer__brand span { font-family: var(--serif); font-weight: 700; font-size: 17px; letter-spacing: .16em; }
.footer__tagline { font-size: 14px; line-height: 1.95; color: var(--dark-text); margin: 0; max-width: 340px; }
.footer__label {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .24em;
  color: var(--muted);
  margin-bottom: 20px;
}
.footer__links { display: grid; gap: 11px; font-size: 14px; color: var(--ink-foot); }
.footer__link {
  background: none;
  border: 0;
  padding: 0;
  font: inherit;
  color: inherit;
  text-align: left;
  cursor: pointer;
  transition: color .15s;
}
.footer__link:hover { color: var(--green-light); }
.footer__bottom {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  padding-top: 26px;
  font-size: 12.5px;
  color: var(--muted);
}
.footer__bottom .mono { font-family: var(--mono); letter-spacing: .18em; }

/* ------------------------------ 静态媒体图 ------------------------------ */
/* 容器用 aspect-ratio 贴合图片比例，cover 铺满：不裁边、不留白 */
.media-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

/* ------------------------------ 联系卡 ------------------------------ */
.contact-card {
  border: 1px solid #1B3454;
  background: #1B3454;
  color: #FFFFFF;
  padding: 40px 38px 44px;
}
.contact-card__label {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .24em;
  color: var(--green-light);
  margin-bottom: 18px;
}
.contact-card__slogan {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 20px;
  line-height: 1.8;
  color: #FFFFFF;
  margin-bottom: 28px;
}
.contact-card__rows { display: grid; gap: 20px; margin: 0; }
.contact-card__rows > div { border-top: 1px solid rgba(255, 255, 255, .16); padding-top: 16px; }
.contact-card__rows dt {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .2em;
  color: rgba(255, 255, 255, .6);
  margin-bottom: 8px;
}
.contact-card__rows dd { margin: 0; font-size: 16px; color: #FFFFFF; }
.contact-card__rows a { color: #FFFFFF; text-decoration: underline; text-underline-offset: 3px; }
.contact-card__rows a:hover { color: var(--green-light); }

/* -------------------------------- 响应式 --------------------------------- */
@media (max-width: 1080px) {
  :root { --pad: 32px; }
  .h1--home { font-size: 52px; }
  .h1--solutions { font-size: 46px; }
  .h1--about { font-size: 44px; }
  .h2 { font-size: 32px; }
  .h2--sm { font-size: 29px; }
  .cta__title { font-size: 32px; }
  .metrics__inner { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .metric { padding: 36px 22px; }
  .metric:nth-child(2n) { border-right: 0; }
  .metric:nth-child(n + 3) { border-top: 1px solid var(--dark-line); }
  .metric:first-child { padding-left: 22px; }
  .metric:last-child { padding-right: 22px; }
  /* 栅格保持紧凑，避免大屏下被过早压扁 */
  .grid--4, .fault-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .split { gap: 56px; }
  .duo, .cta__inner { grid-template-columns: minmax(0, 1fr); gap: 32px; }
  .pad-lg, .pad-md { padding: 72px var(--pad); }
}

/* 双栏文案区在平板上仍保持左右分栏（与原版一致），只收紧间距 */
@media (max-width: 900px) {
  .split { gap: 44px; }
  .about-split { gap: 40px; }
  .grid--3 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero--home .hero__inner,
  .hero--about .hero__inner { grid-template-columns: minmax(0, 1fr); gap: 44px; }
}

/* 窄屏才改为单列 */
@media (max-width: 760px) {
  .split, .about-split, .cases, .footer__cols { grid-template-columns: minmax(0, 1fr); }
  .split { gap: 34px; align-items: start; }
}

@media (max-width: 760px) {
  :root { --pad: 20px; }
  .h1--home { font-size: 34px; }
  .h1--solutions { font-size: 32px; }
  .h1--about { font-size: 30px; }
  .h2, .cta__title { font-size: 24px; }
  .h2--sm { font-size: 22px; }
  .lede, .copy, .split__text { font-size: 15px; }
  .pull, .pull--tight { font-size: 18px; padding-left: 18px; }
  .grid--2, .grid--3, .grid--4, .fault-grid, .metrics__inner { grid-template-columns: minmax(0, 1fr); }
  .grid--gap { gap: 28px; }
  .metric { border-right: 0; border-top: 1px solid var(--dark-line); padding: 28px 0; }
  .metric:first-child { border-top: 0; }
  .rule-head { flex-direction: column; align-items: flex-start; gap: 10px; }
  .header__inner { height: auto; padding-top: 12px; padding-bottom: 12px; flex-wrap: wrap; gap: 12px; }
  .nav { gap: 18px; flex-wrap: wrap; }
  .nav__link { font-size: 13.5px; }
  .nav__cta { height: 34px; padding: 0 14px; font-size: 12.5px; }
  .job { grid-template-columns: minmax(0, 1fr) auto; row-gap: 6px; }
  .job__arrow { grid-column: 2; grid-row: 1; }
  .panel__row { grid-template-columns: minmax(0, 1fr); gap: 6px; }
  .philosophy__row { font-size: 20px; }
  .os-flow { font-size: 17px; gap: 12px; }
  .os-flow__tail { margin-left: 0; }
  .loop__chain { font-size: 18px; gap: 12px; }
  .btn { height: 46px; padding: 0 22px; font-size: 14px; }
  .btn--green { height: 48px; padding: 0 24px; }
}

/* ------------------------------------------------------------------
   小型绿色标签：统一放大到 13px 并加粗（组长反馈：原 11px 看不清）
   ------------------------------------------------------------------ */
.eyebrow, .eyebrow--section, .figure-block__cap, .crossbar__label,
.loop__label, .case__eyebrow, .cta__eyebrow, .panel__label, .split__label,
.agent__eyebrow, .adv__num, .philosophy__label, .status__num,
.contact__label, .contact-card__label {
  font-size: 13px;
  font-weight: 700;
}

/* 卡片编号 01/02…：14px 加粗（组长反馈：首页核心矛盾编号太小） */
.num { font-size: 14px; font-weight: 700; }