/* ==========================================================================
   动力云科技官网 · 设计系统 v2「工程蓝图 / POWER SPEC」
   理念：像一份高精度工程技术规格书——纸面、油墨、规线、等宽注记、
   大字号对比、唯一主色电力青 + 少量安全橙信号点。拒绝辉光渐变模板感。
   ========================================================================== */

/* ---------- Tokens ---------- */
:root {
  --ink: #0C1524;            /* 油墨深空蓝 */
  --ink-2: #121E33;
  --ink-line: rgba(255, 255, 255, 0.12);
  --paper: #F7F8F6;          /* 暖白纸面 */
  --surface: #FFFFFF;
  --line: rgba(12, 21, 36, 0.16);       /* 规线 */
  --line-strong: rgba(12, 21, 36, 0.82);
  --text: #14202F;
  --muted: #5A6B7E;
  --brand: #00A88F;          /* 电力青 */
  --brand-deep: #00796B;
  --brand-bright: #1ACDA9;   /* 深底上的青 */
  --volt: #FF5A1F;           /* 安全橙：仅信号点级使用 */
  --radius: 3px;
  --radius-sm: 2px;
  --offset: 6px 6px 0 0 var(--ink);     /* 实体投影 */
  --shadow-1: 0 1px 0 rgba(12, 21, 36, 0.06);
  --container: 1180px;
  --sec-y: clamp(68px, 9vw, 120px);
  --font: "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas, "Courier New", monospace;
  /* 工程蓝图网格（叠加在纸面/油墨底上） */
  --bp-light: linear-gradient(rgba(12, 21, 36, 0.05) 1px, transparent 1px),
              linear-gradient(90deg, rgba(12, 21, 36, 0.05) 1px, transparent 1px);
  --bp-dark: linear-gradient(rgba(255, 255, 255, 0.055) 1px, transparent 1px),
             linear-gradient(90deg, rgba(255, 255, 255, 0.055) 1px, transparent 1px);
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--paper);
}
img, svg { max-width: 100%; display: block; }
a { color: var(--brand-deep); text-decoration: none; }
a:hover { color: var(--brand); }
h1, h2, h3, h4 { line-height: 1.25; margin: 0 0 0.5em; font-weight: 800; letter-spacing: 0.005em; }
p { margin: 0 0 1em; }
ul { padding-left: 1.2em; }
::selection { background: var(--brand); color: #fff; }
:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; border-radius: 2px; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 200;
  background: var(--ink); color: #fff; padding: 10px 18px; border-radius: 0 0 4px 0;
}
.skip-link:focus { left: 0; color: #fff; }

/* ---------- Type utilities ---------- */
.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-weight: 600;
}
.eyebrow::before { content: "■"; color: var(--brand); font-size: 9px; line-height: 1; }
.on-dark .eyebrow { color: rgba(255, 255, 255, 0.85); }
.on-dark .eyebrow::before { color: var(--brand-bright); }
.sec-head { max-width: 760px; margin-bottom: clamp(36px, 5vw, 60px); }
.sec-head h2 { font-size: clamp(28px, 4vw, 44px); letter-spacing: -0.01em; }
.sec-head p { color: var(--muted); font-size: 17px; margin: 0; }
.sec-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.sec-head.center .eyebrow { justify-content: center; }
/* 兼容旧类：不再使用渐变字，改为实色电力青 */
.grad-text { color: var(--brand-deep); }
/* 高亮词：实色电力青色块（非渐变、非辉光） */
.hl {
  background: var(--brand);
  color: #fff;
  padding: 0 0.16em;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius);
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  line-height: 1.4;
}
.btn:active { transform: translate(2px, 2px); }
.btn-primary { background: var(--brand-deep); color: #fff; border-color: var(--brand-deep); }
.btn-primary:hover { background: #00655A; border-color: #00655A; color: #fff; box-shadow: var(--offset); }
.btn-ghost { border-color: var(--line-strong); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--brand); color: var(--brand-deep); box-shadow: var(--offset); }
.btn-ghost-dark { border-color: rgba(255, 255, 255, 0.4); color: #fff; background: transparent; }
.btn-ghost-dark:hover { border-color: var(--brand-bright); color: var(--brand-bright); box-shadow: 6px 6px 0 0 rgba(26, 205, 169, 0.35); }
.btn-sm { padding: 8px 16px; font-size: 14px; }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(247, 248, 246, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line-strong);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 66px; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; color: var(--ink); flex-shrink: 0; }
.brand:hover { color: var(--ink); }
.brand-mark { flex-shrink: 0; }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { font-size: 18px; letter-spacing: 0.02em; font-weight: 800; }
.brand-text em { font-style: normal; font-family: var(--mono); font-size: 10px; letter-spacing: 0.18em; color: var(--muted); }
.main-nav { display: flex; align-items: center; gap: 26px; }
.main-nav > a { color: var(--ink); font-size: 15px; font-weight: 600; position: relative; padding: 4px 10px; }
.main-nav > a:hover { color: var(--brand-deep); }
.main-nav > a.active { color: var(--brand-deep); }
.main-nav > a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -5px;
  height: 3px; background: var(--brand);
}
/* 旗下产品下拉导航 */
.nav-drop { position: relative; }
.nav-drop-btn {
  display: inline-flex; align-items: center; gap: 6px;
  background: none; border: 0; padding: 4px 0; cursor: pointer;
  color: var(--ink); font-size: 15px; font-weight: 600; font-family: inherit;
}
.nav-drop-btn:hover { color: var(--brand-deep); }
.nav-drop-btn .caret { font-size: 10px; color: var(--muted); transition: transform 0.2s ease; }
.nav-drop.open .nav-drop-btn .caret { transform: rotate(180deg); }
.nav-drop-panel a {
  display: flex; flex-direction: column; gap: 3px;
  padding: 11px 14px; border-radius: var(--radius-sm); color: var(--ink);
  border-left: 2px solid transparent;
}
.nav-drop-panel a:hover { background: var(--paper); color: var(--brand-deep); border-left-color: var(--brand); }
.nav-drop-panel a strong { font-size: 14.5px; font-weight: 700; }
.nav-drop-panel a span { font-family: var(--mono); font-size: 11px; color: var(--muted); }
@media (min-width: 769px) {
  .nav-drop-panel {
    position: absolute; top: calc(100% + 14px); left: 50%;
    transform: translateX(-50%) translateY(4px);
    min-width: 260px; background: var(--surface);
    border: 1px solid var(--line-strong); border-radius: var(--radius);
    box-shadow: var(--offset); padding: 8px; z-index: 120;
    opacity: 0; visibility: hidden;
    transition: opacity 0.16s ease, transform 0.16s ease, visibility 0.16s;
  }
  .nav-drop-panel::before {
    content: ""; position: absolute; top: -14px; left: 0; right: 0; height: 14px;
  }
  .nav-drop:hover .nav-drop-panel,
  .nav-drop:focus-within .nav-drop-panel,
  .nav-drop.open .nav-drop-panel {
    opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0);
  }
}
.nav-cta { margin-left: 4px; padding: 12px 24px; color: #fff; }
.nav-cta:hover, .nav-cta:focus, .nav-cta:active {
  background: #fff; color: var(--brand-deep); border-color: var(--brand);
  box-shadow: 0 4px 14px rgba(0, 165, 143, 0.25);
}
.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: 0; padding: 8px; cursor: pointer;
}
.nav-toggle span { width: 22px; height: 2px; background: var(--ink); border-radius: 0; transition: transform 0.2s ease, opacity 0.2s ease; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero（首页）：纸面 + 蓝图网格 + 超大标题 ---------- */
.hero {
  position: relative;
  background: var(--paper);
  color: var(--ink);
  overflow: hidden;
  border-bottom: 1px solid var(--line);
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image: var(--bp-light);
  background-size: 52px 52px;
  pointer-events: none;
}
.hero::after {
  content: ""; position: absolute; top: 0; bottom: 0; right: 8%;
  width: 1px;
  background: repeating-linear-gradient(180deg, var(--line) 0 6px, transparent 6px 14px);
  pointer-events: none;
}
.hero-inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1.06fr 0.94fr; gap: 56px;
  align-items: center;
  padding: clamp(72px, 10vw, 128px) 0 clamp(64px, 8vw, 104px);
}
.hero h1 {
  font-size: clamp(38px, 5.6vw, 66px);
  letter-spacing: -0.01em;
  margin: 18px 0 22px;
  font-weight: 900;
  line-height: 1.14;
}
.hero-sub { color: var(--muted); font-size: clamp(16px, 1.6vw, 18px); max-width: 34em; margin-bottom: 34px; }
.hero-ctas { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 42px; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 0; border: 1px solid var(--line); }
.hero-tags span {
  font-family: var(--mono); font-size: 12px; letter-spacing: 0.06em;
  color: var(--muted);
  padding: 7px 14px;
  border-right: 1px solid var(--line);
}
.hero-tags span:last-child { border-right: 0; }
.hero-tags span b { color: var(--brand-deep); font-weight: 700; }

/* 顶部电力标尺线：加载时一次生长，非循环扫描 */
.energy-line {
  position: absolute; left: 0; right: 0; top: 0; height: 3px; z-index: 2;
  background: var(--brand);
  transform-origin: left;
  animation: grow 0.9s cubic-bezier(0.22, 1, 0.36, 1) both;
  pointer-events: none;
}
@keyframes grow { from { transform: scaleX(0); } to { transform: scaleX(1); } }

/* Hero 右侧：工程规格卡（深色面板压在纸面上，成为唯一焦点） */
.hero-panel {
  position: relative; z-index: 1;
  background: var(--ink);
  color: rgba(255, 255, 255, 0.88);
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  padding: 22px;
  box-shadow: 10px 10px 0 0 rgba(12, 21, 36, 0.14);
}
.hero-panel::before,
.hero-panel::after {
  content: "+"; position: absolute;
  font-family: var(--mono); font-size: 15px; line-height: 1;
  color: var(--brand-bright);
}
.hero-panel::before { top: -9px; left: -7px; }
.hero-panel::after { bottom: -9px; right: -7px; }
.hero-panel-head {
  display: flex; align-items: center; justify-content: space-between;
  font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.6);
  border-bottom: 1px dashed rgba(255, 255, 255, 0.2);
  padding-bottom: 12px; margin-bottom: 14px;
}
.hero-panel-head .dots { display: inline-flex; gap: 5px; }
.hero-panel-head .dots i { width: 8px; height: 8px; border-radius: 0; background: rgba(255, 255, 255, 0.2); }
.hero-panel-head .dots i:first-child { background: var(--brand-bright); }
.hero-panel pre {
  margin: 0; font-family: var(--mono); font-size: 12.6px; line-height: 1.9;
  color: rgba(255, 255, 255, 0.86); white-space: pre; overflow-x: auto;
}
.hero-panel .c { color: rgba(255, 255, 255, 0.4); }
.hero-panel .k { color: var(--brand-bright); }
.hero-panel .s { color: #FFB38A; }
.hero-panel-foot {
  display: flex; gap: 18px; margin-top: 14px; padding-top: 12px;
  border-top: 1px dashed rgba(255, 255, 255, 0.2);
  font-family: var(--mono); font-size: 11.5px; color: rgba(255, 255, 255, 0.58);
  font-variant-numeric: tabular-nums;
}
.hero-panel-foot b { color: var(--brand-bright); font-weight: 700; }

/* ---------- 信任数据带：油墨横带 + 巨大等宽数字 ---------- */
.stats-band { background: var(--ink); color: #fff; background-image: var(--bp-dark); background-size: 52px 52px; border-bottom: 1px solid var(--line); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; padding: 38px 0; }
.stat { border-left: 2px solid var(--brand); padding-left: 16px; }
.stat b {
  font-family: var(--mono); font-size: clamp(28px, 3.4vw, 42px); font-weight: 700;
  color: #fff; display: block; line-height: 1.15;
  font-variant-numeric: tabular-nums; letter-spacing: -0.02em;
}
.stat span { font-size: 13.5px; color: rgba(255, 255, 255, 0.6); }

/* ---------- 通用 section ---------- */
.section { padding: 20px 0; }
.section-tint { background: var(--surface); border-block: 1px solid var(--line); }

/* ---------- 服务卡片 ---------- */
.svc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.svc-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 26px 24px;
  display: flex; flex-direction: column;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}
.svc-card::before {
  content: ""; position: absolute; top: -1px; left: -1px; right: -1px;
  height: 3px; background: var(--brand);
  transform: scaleX(0); transform-origin: left;
  transition: transform 0.25s cubic-bezier(0.22, 1, 0.36, 1);
}
.svc-card:hover { transform: translate(-3px, -3px); box-shadow: var(--offset); border-color: var(--line-strong); }
.svc-card:hover::before { transform: scaleX(1); }
.svc-idx {
  font-family: var(--mono); font-size: 13px; font-weight: 700;
  color: var(--brand-deep); letter-spacing: 0.12em;
  display: flex; align-items: center; gap: 10px; margin-bottom: 18px;
  font-variant-numeric: tabular-nums;
}
.svc-idx::after { content: ""; height: 1px; flex: 1; background: var(--line); }
.svc-card h3 { font-size: 19px; margin-bottom: 10px; }
.svc-card p { color: var(--muted); font-size: 14.5px; margin: 0 0 18px; flex: 1; }
.svc-card .more { font-size: 14px; font-weight: 700; color: var(--ink); display: inline-flex; align-items: center; gap: 6px; }
.svc-card .more::after { content: "→"; color: var(--brand-deep); transition: transform 0.2s ease; }
.svc-card:hover .more::after { transform: translateX(4px); }

/* ---------- 案例卡片 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.case-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; display: flex; flex-direction: column;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}
.case-card:hover { transform: translate(-3px, -3px); box-shadow: var(--offset); border-color: var(--line-strong); }
.case-cover { aspect-ratio: 16 / 9; background: var(--ink); position: relative; overflow: hidden; border-bottom: 1px solid var(--line); }
.case-cover img, .case-cover svg { width: 100%; height: 100%; object-fit: cover; }
.case-body { padding: 22px 22px 20px; display: flex; flex-direction: column; flex: 1; }
.case-meta { display: flex; align-items: center; gap: 10px; margin-bottom: 10px; }
.case-tag {
  font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em;
  color: var(--brand-deep); background: transparent;
  border: 1px solid var(--brand);
  padding: 2px 9px; border-radius: var(--radius-sm);
}
.case-customer { font-size: 12.5px; color: var(--muted); }
.case-body h3 { font-size: 17.5px; margin-bottom: 8px; }
.case-body h3 a { color: var(--ink); }
.case-body h3 a:hover { color: var(--brand-deep); }
.case-body p {
  color: var(--muted); font-size: 14px; margin: 0 0 14px; flex: 1;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}

/* ---------- 新闻（首页改为台账行式） ---------- */
.news-grid {
  display: flex; flex-direction: column;
  border-top: 1px solid var(--line-strong);
}
.news-item {
  display: grid;
  grid-template-columns: 132px 1fr;
  grid-template-areas: "meta title" "meta summary";
  column-gap: 26px; row-gap: 4px;
  padding: 22px 4px;
  border-bottom: 1px solid var(--line);
  background: transparent;
  transition: background 0.15s ease;
}
.news-item:hover { background: var(--surface); }
.news-meta {
  grid-area: meta;
  font-family: var(--mono); font-size: 12px; color: var(--muted);
  display: flex; flex-direction: column; gap: 6px; align-items: flex-start;
  font-variant-numeric: tabular-nums;
  padding-top: 3px;
}
.news-meta .src {
  color: var(--brand-deep);
  border: 1px solid var(--line);
  padding: 1px 8px; border-radius: var(--radius-sm);
  font-size: 11px; letter-spacing: 0.06em;
}
.news-item h3 { grid-area: title; font-size: 18.5px; line-height: 1.5; margin: 0; font-weight: 700; }
.news-item h3 a { color: var(--ink); }
.news-item h3 a:hover { color: var(--brand-deep); }
.news-item p {
  grid-area: summary;
  color: var(--muted); font-size: 14px; margin: 0;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.more-row { text-align: center; margin-top: 36px; }

/* ---------- 优势 / 流程 ---------- */
.adv-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.adv-item { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px; }
.adv-item h3 { font-size: 17px; margin-bottom: 8px; display: flex; align-items: center; gap: 10px; }
.adv-item h3::before { content: "■"; color: var(--brand); font-size: 9px; }
.adv-item p { color: var(--muted); font-size: 14.5px; margin: 0; }
.flow-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border: 1px solid var(--line); background: var(--surface); border-radius: var(--radius); }
.flow-step { position: relative; padding: 26px 24px; }
.flow-step + .flow-step { border-left: 1px solid var(--line); }
.flow-n {
  font-family: var(--mono); font-size: 32px; font-weight: 700;
  color: var(--brand); margin-bottom: 10px; line-height: 1;
  font-variant-numeric: tabular-nums;
}
.flow-step h3 { font-size: 16.5px; margin-bottom: 6px; }
.flow-step p { color: var(--muted); font-size: 13.8px; margin: 0; }

/* ---------- FAQ ---------- */
.faq-list { max-width: 780px; margin: 0 auto; display: grid; gap: 10px; }
.faq-item {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm);
  overflow: hidden;
}
.faq-item[open] { border-color: var(--line-strong); }
.faq-item summary {
  cursor: pointer; list-style: none; padding: 18px 54px 18px 20px;
  font-weight: 700; font-size: 15.5px; position: relative; color: var(--ink);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+"; position: absolute; right: 20px; top: 50%; transform: translateY(-50%);
  font-family: var(--mono); font-size: 20px; color: var(--brand-deep); transition: transform 0.2s ease;
}
.faq-item[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.faq-item .faq-a { padding: 0 20px 18px; color: var(--muted); font-size: 14.5px; border-top: 1px dashed var(--line); padding-top: 14px; margin: 0 0 0; }
.faq-item .faq-a p:last-child { margin-bottom: 0; }

/* ---------- CTA band ---------- */
.cta-band { background: var(--ink); color: #fff; position: relative; overflow: hidden; background-image: var(--bp-dark); background-size: 52px 52px; border-top: 3px solid var(--brand); }
.cta-inner { position: relative; z-index: 1; text-align: center; padding: clamp(60px, 7.5vw, 92px) 0; }
.cta-inner h2 { font-size: clamp(26px, 3.6vw, 42px); margin-bottom: 14px; letter-spacing: -0.01em; }
.cta-inner p { color: rgba(255, 255, 255, 0.68); margin-bottom: 30px; }

/* ---------- 子页 hero：纸面蓝图，与首页同语言 ---------- */
.page-hero {
  background: var(--paper);
  color: var(--ink);
  position: relative; overflow: hidden;
  padding: clamp(52px, 6.5vw, 84px) 0;
  border-bottom: 1px solid var(--line-strong);
}
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background-image: var(--bp-light);
  background-size: 52px 52px;
  pointer-events: none;
}
.page-hero::after {
  content: ""; position: absolute; left: 0; bottom: -1px; height: 3px; width: 120px;
  background: var(--brand);
}
.page-hero .container { position: relative; z-index: 1; }
.breadcrumb { font-family: var(--mono); font-size: 12px; color: var(--muted); margin-bottom: 16px; letter-spacing: 0.04em; }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--brand-deep); }
.breadcrumb i { font-style: normal; margin: 0 8px; opacity: 0.5; }
.page-hero h1 { font-size: clamp(30px, 4.4vw, 50px); margin-bottom: 12px; font-weight: 900; letter-spacing: -0.01em; }
.page-hero .page-lead { color: var(--muted); font-size: 17px; max-width: 44em; margin: 0; }

/* ---------- 业务详情 ---------- */
.svc-detail { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: start; }
.svc-detail-main h2 { font-size: 21px; margin: 34px 0 14px; padding-left: 12px; border-left: 3px solid var(--brand); }
.svc-detail-main > p { color: var(--muted); font-size: 16.5px; }
.feat-list { display: grid; gap: 12px; margin: 0; padding: 0; list-style: none; }
.feat-list li { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 16px 20px; border-left: 2px solid var(--brand); }
.feat-list b { display: block; font-size: 15.5px; margin-bottom: 4px; }
.feat-list span { color: var(--muted); font-size: 14px; }
.svc-side { position: sticky; top: 92px; display: grid; gap: 16px; }
.side-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.side-card h3 { font-size: 15px; margin-bottom: 12px; font-family: var(--mono); letter-spacing: 0.08em; color: var(--brand-deep); }
.side-card ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.side-card ul a { font-size: 14.5px; color: var(--ink); display: flex; justify-content: space-between; align-items: center; }
.side-card ul a:hover { color: var(--brand-deep); }
.side-card ul a::after { content: "→"; color: var(--brand-deep); }
.side-contact { text-align: left; }
.side-contact h3 { color: var(--ink); font-family: var(--font); font-size: 17px; }
.side-contact p { font-size: 14px; color: var(--muted); margin-bottom: 16px; }

/* ---------- 案例 / 新闻详情 ---------- */
.article-wrap { max-width: 820px; margin: 0 auto; }
.article-wrap .article-cover { border-radius: var(--radius); overflow: hidden; margin-bottom: 28px; border: 1px solid var(--line-strong); background: var(--ink); }
.article-body { background: var(--surface); border: 1px solid var(--line-strong); border-radius: var(--radius); padding: clamp(24px, 4vw, 48px); box-shadow: 10px 10px 0 0 rgba(12, 21, 36, 0.08); }
.article-body h2 { font-size: 20px; margin: 30px 0 12px; padding-left: 12px; border-left: 3px solid var(--brand); }
.article-body h2:first-child { margin-top: 0; }
.article-body p, .article-body li { color: #37455C; font-size: 15.5px; }
.article-body strong { color: var(--ink); }
.article-meta {
  font-family: var(--mono); font-size: 12px; color: var(--muted);
  display: flex; flex-wrap: wrap; gap: 8px 20px; margin-bottom: 24px;
  padding-bottom: 16px; border-bottom: 1px solid var(--line);
  font-variant-numeric: tabular-nums; letter-spacing: 0.04em;
}
.article-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 26px; padding-top: 20px; border-top: 1px dashed var(--line); }
.article-tags span { font-family: var(--mono); font-size: 11.5px; color: var(--brand-deep); border: 1px solid var(--brand); padding: 3px 10px; border-radius: var(--radius-sm); }

/* 新闻导读卡（兼容保留） */
.news-source-card {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 14px;
  background: var(--paper); border: 1px dashed var(--line-strong);
  border-radius: var(--radius-sm); padding: 16px 20px; margin-top: 22px;
}
.news-source-card p { margin: 0; font-size: 14px; color: var(--muted); }

/* 正文内排版（新闻/案例 HTML 内容） */
.article-body img { border: 1px solid var(--line); border-radius: var(--radius-sm); margin: 8px 0; }
.article-body blockquote { margin: 1em 0; padding: 10px 18px; border-left: 3px solid var(--brand); background: var(--paper); color: var(--muted); }

/* ---------- 列表页（新闻/案例）行式台账 ---------- */
.row-list { display: grid; gap: 0; max-width: 880px; margin: 0 auto; border-top: 1px solid var(--line-strong); }
.row-item {
  background: transparent; border: 0; border-bottom: 1px solid var(--line);
  border-radius: 0; padding: 22px 6px;
  transition: background 0.15s ease;
}
.row-item:hover { background: var(--surface); }
.row-item h3 { font-size: 17px; margin: 0 0 6px; font-weight: 700; }
.row-item h3 a { color: var(--ink); }
.row-item h3 a:hover { color: var(--brand-deep); }
.row-item p { color: var(--muted); font-size: 14px; margin: 0 0 10px; }

.pager { display: flex; justify-content: center; gap: 8px; margin-top: 36px; }
.pager a, .pager span {
  min-width: 38px; height: 38px; display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--line-strong); border-radius: var(--radius-sm); font-size: 14px; padding: 0 12px;
  background: var(--surface); color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.pager .current { background: var(--ink); color: #fff; border-color: var(--ink); }
.pager a:hover { background: var(--brand); border-color: var(--brand); color: #fff; }

.empty-tip {
  text-align: center; color: var(--muted); padding: 48px 20px;
  border: 1px dashed var(--line-strong); border-radius: var(--radius); background: var(--surface);
}

/* ---------- 联系表单 ---------- */
.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 48px; align-items: start; }
.contact-info h2 { font-size: 22px; padding-left: 12px; border-left: 3px solid var(--brand); }
.contact-info .info-list { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 16px; border-top: 1px solid var(--line-strong); }
.contact-info .info-list li { display: flex; gap: 14px; align-items: flex-start; padding: 13px 2px; border-bottom: 1px solid var(--line); }
.contact-info .info-list .k { font-family: var(--mono); font-size: 11.5px; letter-spacing: 0.12em; color: var(--brand-deep); text-transform: uppercase; width: 76px; flex-shrink: 0; padding-top: 4px; }
.contact-info .info-list .v { font-size: 15px; color: var(--ink); }
.contact-form { background: var(--surface); border: 1px solid var(--line-strong); border-radius: var(--radius); padding: clamp(24px, 4vw, 36px); box-shadow: 10px 10px 0 0 rgba(12, 21, 36, 0.08); }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-field { display: flex; flex-direction: column; gap: 7px; }
.form-field.full { grid-column: 1 / -1; }
.form-field label { font-size: 13.5px; font-weight: 700; font-family: var(--mono); letter-spacing: 0.06em; color: var(--ink); }
.form-field label em { color: var(--volt); font-style: normal; }
.form-field input, .form-field textarea {
  font: inherit; font-size: 15px; color: var(--ink);
  border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 11px 14px;
  background: var(--paper); transition: border-color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
  width: 100%;
}
.form-field textarea { min-height: 130px; resize: vertical; }
.form-field input:focus, .form-field textarea:focus {
  outline: none; border-color: var(--brand); background: #fff;
  box-shadow: 3px 3px 0 0 rgba(0, 168, 143, 0.25);
}
.form-foot { grid-column: 1 / -1; display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; }
.form-tip { font-size: 13px; color: var(--muted); margin: 0; }
.form-ok { background: rgba(0, 168, 143, 0.08); border: 1px solid var(--brand); color: var(--brand-deep); border-radius: var(--radius-sm); padding: 12px 16px; margin-bottom: 18px; font-size: 14.5px; }
.form-err { background: rgba(229, 72, 77, 0.07); border: 1px solid #E5484D; color: #C5373C; border-radius: var(--radius-sm); padding: 12px 16px; margin-bottom: 18px; font-size: 14.5px; }

/* ---------- 关于页 ---------- */
.about-grid { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 48px; align-items: start; }
.about-prose { background: var(--surface); border: 1px solid var(--line-strong); border-radius: var(--radius); padding: clamp(24px, 4vw, 40px); box-shadow: 10px 10px 0 0 rgba(12, 21, 36, 0.08); }
.about-prose h2 { padding-left: 12px; border-left: 3px solid var(--brand); font-size: 20px; }
.about-prose p { color: #37455C; font-size: 15.5px; }
.about-side { display: grid; gap: 16px; }
.mv-card { background: var(--ink); color: #fff; border-radius: var(--radius); padding: 26px; background-image: var(--bp-dark); background-size: 52px 52px; }
.mv-card h3 { color: var(--brand-bright); font-size: 14px; font-family: var(--mono); letter-spacing: 0.16em; margin-bottom: 10px; }
.mv-card p { color: rgba(255, 255, 255, 0.8); font-size: 14.5px; margin: 0; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--ink); color: rgba(255, 255, 255, 0.75); margin-top: 0; border-top: 3px solid var(--brand); }
.footer-grid { display: grid; grid-template-columns: 1.3fr 1fr 1fr 1.5fr; gap: 40px; padding: clamp(48px, 6vw, 72px) 0 40px; }
.footer-brand p { font-size: 14px; color: rgba(255, 255, 255, 0.58); margin: 14px 0 16px; }
.brand-light { color: #fff; }
.brand-light strong { font-size: 17px; }
.footer-school { font-family: var(--mono); font-size: 12px; color: var(--brand-bright) !important; border: 1px solid rgba(26, 205, 169, 0.4); padding: 6px 12px; border-radius: var(--radius-sm); display: inline-block; }
.footer-school:hover { border-color: var(--brand-bright); }
.footer-col h3 { font-size: 12px; font-family: var(--mono); letter-spacing: 0.18em; color: rgba(255, 255, 255, 0.45); text-transform: uppercase; margin-bottom: 16px; }
.footer-col a, .footer-col p { display: block; color: rgba(255, 255, 255, 0.72); font-size: 14px; margin: 0 0 10px; }
.footer-col a:hover { color: var(--brand-bright); }
.footer-bottom {
  border-top: 1px solid var(--ink-line);
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px;
  padding: 20px 0; font-size: 13px; color: rgba(255, 255, 255, 0.42);
  font-family: var(--mono); letter-spacing: 0.04em;
}
.footer-bottom a { color: rgba(255, 255, 255, 0.42); }
.footer-bottom a:hover { color: var(--brand-bright); }

/* ---------- 404 ---------- */
.nf-wrap { text-align: center; padding: clamp(80px, 12vw, 140px) 24px; }
.nf-code {
  font-family: var(--mono); font-size: clamp(72px, 12vw, 140px); font-weight: 700;
  color: var(--ink); line-height: 1; letter-spacing: -0.04em;
  font-variant-numeric: tabular-nums;
}
.nf-code::after { content: " _"; color: var(--brand); }
.nf-wrap h1 { font-size: 22px; }
.nf-wrap p { color: var(--muted); margin-bottom: 28px; }

/* ---------- Reveal 动效（fail-open：默认可见，仅 JS+IO 可用时才隐藏） ---------- */
html.fx .reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.22, 1, 0.36, 1); }
html.fx .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html.fx .reveal { opacity: 1 !important; transform: none !important; transition: none !important; }
  .energy-line { animation: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 44px; }
  .hero-panel { max-width: 640px; }
  .hero::after { display: none; }
  .svc-grid, .case-grid { grid-template-columns: repeat(2, 1fr); }
  .flow-grid { grid-template-columns: repeat(2, 1fr); }
  .flow-step:nth-child(3) { border-left: 0; }
  .flow-step:nth-child(n+3) { border-top: 1px solid var(--line); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .svc-detail, .contact-grid, .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .svc-side { position: static; }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .main-nav {
    display: none;
    position: absolute; top: 66px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--surface); border-bottom: 1px solid var(--line-strong);
    box-shadow: 0 12px 0 0 rgba(12, 21, 36, 0.06);
    padding: 8px 0 14px;
  }
  .main-nav.open { display: flex; }
  .main-nav > a { padding: 13px 24px; border-bottom: 1px solid var(--line); }
  .main-nav > a.active::after { display: none; }
  .nav-drop-btn { width: 100%; justify-content: space-between; padding: 13px 24px; border-bottom: 1px solid var(--line); }
  .nav-drop-panel { display: none; padding: 0 0 8px; background: var(--paper); }
  .nav-drop.open .nav-drop-panel { display: block; }
  .nav-drop-panel a { padding: 12px 24px 12px 38px; border-radius: 0; }
  .nav-drop-panel a:hover { background: transparent; }
  .nav-cta { margin: 12px 24px 0; justify-content: center; }
  .svc-grid, .case-grid, .adv-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .flow-grid { grid-template-columns: 1fr; }
  .flow-step + .flow-step { border-left: 0; border-top: 1px solid var(--line); }
  .flow-step { padding: 22px 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .form-grid { grid-template-columns: 1fr; }
  .hero-inner { padding-top: 56px; }
  .hero-panel pre { font-size: 11.5px; }
  .hero-panel { box-shadow: 6px 6px 0 0 rgba(12, 21, 36, 0.14); }
  /* 首页新闻台账：移动端堆叠 */
  .news-item { grid-template-columns: 1fr; grid-template-areas: "meta" "title" "summary"; row-gap: 8px; }
  .news-meta { flex-direction: row; gap: 10px; align-items: center; }
}