@charset "UTF-8";
/* ==========================================================================
   宁夏鼎鸿福建设工程有限公司 · 官方网站
   main.css — 全站样式
   说明：站点不引用任何外部 CDN 资源，全部字体图标使用内联 SVG / 系统字体。
   ========================================================================== */

/* ---------- 0. 宋体 ---------- */

/* ---------- 1. 设计变量 ---------- */
:root {
  /* ============ BROADSIDE 平面印刷风令牌（Flat · Loud · Printed） ============
     PAPER 纸底 / INK 墨黑 / SIGNAL 红 / ACID 荧光黄 / COBALT 钴蓝 */
  --navy: #1F3DFF;          /* COBALT 钴蓝：链接与强调 */
  --navy-900: #111111;      /* 墨黑：深色区块 / 页脚 */
  --navy-800: #1A1A1A;
  --navy-700: #1633D6;
  --navy-600: #1F3DFF;
  --navy-400: #5B72FF;
  --navy-100: #E4E9FF;
  --navy-50: #F0F3FF;

  --red: #FF3D1F;           /* SIGNAL 信号红：主行动色 */
  --red-600: #E23312;
  --red-50: #FFEDE8;

  --gold: #D8F14B;          /* ACID 荧光黄绿：高亮 */
  --gold-50: #F2FBD9;

  /* 中性色 */
  --ink: #111111;
  --ink-2: #1F1F1F;
  --muted: #6F6A5C;
  --muted-2: #7C7768;
  --line: #111111;
  --line-2: #111111;
  --bg: #F2EEE4;            /* PAPER 纸底 */
  --bg-soft: #E7E1D3;       /* STOCK 次纸底 */
  --surface: #FFFFFF;
  --surface-2: #FFFFFF;
  --chip-bg: #FFFFFF;
  --stripe: #E7E1D3;
  --nav-tint: rgba(242, 238, 228, .95);
  --ok: #1F7A4D;

  /* 尺寸 */
  --wrap: 1200px;
  --wrap-narrow: 900px;
  --radius: 0;
  --radius-sm: 0;
  --shadow-sm: none;
  --shadow: none;
  --shadow-lg: none;

  --header-h: 74px;
  --ease: cubic-bezier(.22, .61, .36, 1);

  /* ============ BROADSIDE 按钮体系：平涂 / 直角 / 2px 硬黑边 / 无阴影 ============ */
  --mono: ui-monospace, "Cascadia Mono", Consolas, "Roboto Mono", "Courier New", "宋体", "SimSun", monospace;
  --display: "Arial Black", "Helvetica Neue", Arial, "Microsoft YaHei", "微软雅黑", sans-serif;
  --btn-font: var(--mono);
  --btn-bg: transparent;
  --btn-grad: none;
  --btn-border: #111111;
  --btn-fg: #111111;
  --btn-text-shadow: none;
  --btn-shadow-hover: none;
  --btn-shadow-active: none;
  --btn-shadow-focus: none;
  --btn-ring: 2px solid #FF3D1F;
}

/* 深色模式下的按钮令牌：改用深灰渐变 + 浅色文字，拟物语言不变。
   写在变体之前，同特异性时变体（.btn--primary 等）后声明仍可胜出。 */
[data-theme="dark"] {
  --btn-bg: transparent;
  --btn-grad: none;
  --btn-border: #F2EEE4;
  --btn-fg: #F2EEE4;
  --btn-text-shadow: none;
  --btn-shadow-hover: none;
  --btn-shadow-active: none;
  --btn-shadow-focus: none;
  --btn-ring: 2px solid #D8F14B;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
  font-size: 18px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink-2);
  font-family: "宋体", "SimSun", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Source Han Sans SC",
    "Noto Sans CJK SC", "Hiragino Sans GB", system-ui, -apple-system, "Segoe UI", serif;
  font-size: 1rem;
  line-height: 1.85;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.nav-open { overflow: hidden; }

img { max-width: 100%; display: block; border: 0; }
a { color: var(--navy-600); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--red); }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5 { margin: 0; color: var(--ink); font-weight: 400; line-height: 1.35; letter-spacing: .01em; }
/* BROADSIDE：纪念碑式展示字 */
h1, h2, h3 {
  font-family: var(--display); font-weight: 900;
  letter-spacing: -.01em; line-height: 1.14;
}
h4, h5 { font-family: var(--mono); text-transform: uppercase; letter-spacing: .14em; }
p { margin: 0 0 1em; }
strong { color: var(--ink); font-weight: 400; }

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

/* ---------- 3. 布局工具 ---------- */
.wrap { width: 100%; max-width: var(--wrap); margin: 0 auto; padding: 0 24px; }
.wrap-narrow { max-width: var(--wrap-narrow); }
.section { padding: 92px 0; }
.section--soft { background: var(--bg-soft); }
.section--navy { background: var(--navy-900); color: #C9C3B4; }
.section--navy h2, .section--navy h3,
.biz h2, .biz h3 { color: #fff; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: 16px; top: -60px; z-index: 2000;
  background: var(--navy); color: #fff; padding: 10px 18px; border-radius: 0 0 8px 8px;
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 0; color: #fff; }

/* ---------- 4. 章节标题 ---------- */
.sec-head { max-width: 760px; margin: 0 auto 54px; text-align: center; }
.sec-head--left { margin-left: 0; text-align: left; }

.sec-head__eyebrow {
  display: flex; width: fit-content; margin: 0 auto 14px;  /* 独占一行居中，避免与 inline h2 同行挤压 */
  align-items: center; gap: 9px;
  font-size: .8rem; font-weight: 400; letter-spacing: .22em;
  color: var(--red); text-transform: uppercase;
}
.sec-head--left .sec-head__eyebrow { margin-left: 0; margin-right: auto; }
.sec-head__eyebrow::before {
  content: ""; width: 26px; height: 2px; background: var(--red); display: block;
}
.sec-head--center .sec-head__eyebrow::after {
  content: ""; width: 26px; height: 2px; background: var(--red); display: block;
}

.sec-head h2 {
  font-size: clamp(1.65rem, 3.1vw, 2.4rem);
  letter-spacing: .02em;
}
.sec-head p { margin-top: 16px; color: var(--muted); font-size: 1.02rem; }

.section--navy .sec-head p,
.biz .sec-head p { color: #C9C3B4; }
.section--navy .sec-head__eyebrow,
.biz .sec-head__eyebrow { color: var(--gold); }
.section--navy .sec-head__eyebrow::before,
.section--navy .sec-head__eyebrow::after,
.biz .sec-head__eyebrow::before,
.biz .sec-head__eyebrow::after { background: var(--gold); }

/* ---------- 5. 顶部导航 ---------- */
.header {
  position: fixed; inset: 0 0 auto 0; z-index: 1000; height: var(--header-h);
  background: var(--bg);
  border-bottom: 2px solid var(--line);
  transition: background .3s var(--ease);
}
/* BROADSIDE 顶部七色色条 */
.header::before {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 7px;
  background: linear-gradient(90deg,
    #F2EEE4 0 14%, #E7E1D3 14% 28%, #FFFFFF 28% 42%,
    #111111 42% 57%, #FF3D1F 57% 71%, #D8F14B 71% 86%, #1F3DFF 86% 100%);
  border-bottom: 1px solid #111111;
}
.header.is-stuck { box-shadow: none; }

.header__inner {
  height: 100%; display: flex; align-items: center; gap: 24px;
}

.brand { display: flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.brand:hover { color: inherit; }
.brand__logo { height: 40px; width: auto; }
.brand__text { display: flex; flex-direction: column; line-height: 1.2; }
.brand__cn { font-size: 1.06rem; font-weight: 400; color: var(--navy); letter-spacing: .04em; }
.brand__en {
  font-size: .6rem; color: var(--muted-2); letter-spacing: .13em; text-transform: uppercase;
  font-weight: 400;
}

.nav { margin-left: auto; }
.nav__list { display: flex; align-items: center; gap: 4px; }
.nav__link {
  position: relative; display: block; padding: 9px 15px; border-radius: 8px;
  font-size: .95rem; font-weight: 400; color: var(--ink-2);
}
.nav__link:hover { background: var(--navy-50); color: var(--navy); }
.nav__link.is-active { color: var(--navy); }
.nav__link.is-active::after {
  content: ""; position: absolute; left: 15px; right: 15px; bottom: 2px; height: 2px;
  background: var(--red); border-radius: 2px;
}

.header__cta {
  display: inline-flex; align-items: center; gap: 8px; flex: 0 0 auto;
  min-height: 44px; padding: 7px 18px;
  background-color: var(--red);
  background-image: none;
  color: #fff; border: 2px solid #111111; border-radius: 0;
  font-family: var(--mono); font-size: .8rem; font-weight: 400;
  text-transform: uppercase; letter-spacing: .08em;
  text-shadow: none; white-space: nowrap;
  box-shadow: none;
  transition: background-color .2s ease, color .2s ease;
}
.header__cta:hover {
  background-image: none; background-color: #111111;
  border-color: #111111; color: #fff; transform: none;
  box-shadow: none;
}
.header__cta:active { transform: translate(1px, 1px); box-shadow: none; }
.header__cta:focus-visible {
  outline: var(--btn-ring); outline-offset: 3px; box-shadow: none;
}
.header__cta svg { width: 15px; height: 15px; }

.burger {
  display: none; width: 42px; height: 42px; margin-left: auto;
  border: 1px solid var(--btn-border);
  background-color: #fff; background-image: var(--btn-grad);
  border-radius: 10px;
  cursor: pointer; padding: 0; position: relative;
  transition: box-shadow .2s var(--ease), border-color .2s var(--ease);
}
.burger span {
  position: absolute; left: 11px; width: 20px; height: 2px; background: var(--navy);
  border-radius: 2px; transition: transform .28s var(--ease), opacity .2s var(--ease);
}
.burger span:nth-child(1) { top: 14px; }
.burger span:nth-child(2) { top: 20px; }
.burger span:nth-child(3) { top: 26px; }
body.nav-open .burger span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
body.nav-open .burger span:nth-child(2) { opacity: 0; }
body.nav-open .burger span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.nav__scrim {
  position: fixed; inset: 0; background: rgba(4, 29, 66, .45); z-index: 999;
  opacity: 0; visibility: hidden; transition: opacity .3s var(--ease), visibility .3s;
}

/* ---------- 6. 按钮（拟物体系） ----------
   皮肤层：.btn + 原生 button + input 提交类控件统一吃渐变底 / #8F9092 描边 / 状态阴影。
   几何层（min-height + padding）只挂 .btn 与 input[type=submit|button|reset]，
   不写在裸 button 上，避免压过 icon-btn / burger / chip / pager 等组件自身的盒子尺寸
   （这些组件显式声明 background 与 border，会自行接管皮肤）。 */
.btn,
button,
input[type="submit"], input[type="button"], input[type="reset"] {
  font-family: var(--btn-font);
  font-size: 16px;
  font-weight: 400;
  color: var(--btn-fg);
  text-shadow: var(--btn-text-shadow);
  cursor: pointer;
  outline: none;
  background-color: var(--btn-bg);
  background-image: var(--btn-grad);
  border: 2px solid var(--btn-border);
  border-radius: 0;
  text-transform: uppercase;
  letter-spacing: .06em;
  transition: background-color .2s ease, color .2s ease, border-color .2s ease;
}

/* 几何：用户示例的固定 150×50 落地为 min-height + padding 驱动，比例一致、可内联排版 */
.btn,
input[type="submit"], input[type="button"], input[type="reset"] {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  min-height: 50px; padding: 0 30px;
  text-align: center; white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; }

/* 状态：沿用用户给定的多层内外阴影，按 :hover / :active / :focus 分层 */
.btn:hover,
button:hover,
input[type="submit"]:hover, input[type="button"]:hover, input[type="reset"]:hover {
  box-shadow: var(--btn-shadow-hover);
}
.btn:active,
button:active,
input[type="submit"]:active, input[type="button"]:active, input[type="reset"]:active {
  box-shadow: var(--btn-shadow-active);
}
.btn:focus,
button:focus,
input[type="submit"]:focus, input[type="button"]:focus, input[type="reset"]:focus {
  box-shadow: var(--btn-shadow-focus);
}
/* 键盘可达性：必须写在 :focus 之后（同特异性后声明者胜），否则 outline:none 会吃掉焦点 */
.btn:focus-visible,
button:focus-visible,
input[type="submit"]:focus-visible, input[type="button"]:focus-visible,
input[type="reset"]:focus-visible {
  outline: var(--btn-ring);
  outline-offset: 3px;
  box-shadow: var(--btn-shadow-focus);
}
/* 链接型按钮：压过全局 a:hover 的变红，颜色一律由变体令牌 --btn-fg 决定 */
a.btn, a.btn:hover, a.btn:active, a.btn:focus, a.btn:focus-visible { color: var(--btn-fg); }

/* 禁用态：写在状态之后，同特异性靠后声明覆盖 */
.btn:disabled, button:disabled,
input[type="submit"]:disabled, input[type="button"]:disabled, input[type="reset"]:disabled {
  opacity: .55; cursor: not-allowed; box-shadow: none;
}

/* 变体 —— 只改令牌，形状与状态全套继承（BROADSIDE 平涂语言） */
.btn--primary {
  --btn-bg: var(--red);
  --btn-grad: none;
  --btn-border: #111111;
  --btn-fg: #fff;
  --btn-text-shadow: none;
}
.btn--navy {
  --btn-bg: #111111;
  --btn-grad: none;
  --btn-border: #111111;
  --btn-fg: #fff;
  --btn-text-shadow: none;
}
/* 幽灵按钮：仅用于深色底（首屏 / 深色区块 / CTA 条 / 联系侧栏） */
.btn--ghost {
  --btn-bg: transparent;
  --btn-grad: none;
  --btn-border: rgba(255, 255, 255, .85);
  --btn-fg: #fff;
  --btn-text-shadow: none;
}
.btn--ghost:hover {
  --btn-bg: #fff;
  --btn-grad: none;
  --btn-border: #fff;
  --btn-fg: #111111;
  --btn-text-shadow: none;
}
.btn--outline {
  --btn-bg: transparent;
  --btn-grad: none;
  --btn-border: #111111;
  --btn-fg: #111111;
}
.btn--outline:hover { --btn-bg: var(--gold); --btn-border: #111111; --btn-fg: #111111; }
/* 文字按钮：无底无描边 */
.btn--text {
  --btn-bg: transparent;
  --btn-grad: none;
  --btn-border: transparent;
  --btn-fg: #1F3DFF;
  --btn-text-shadow: none;
  min-height: auto; padding: 6px 2px; border-radius: 0;
  text-transform: none;
}
.btn--text:hover {
  --btn-fg: var(--red);
  box-shadow: none; text-decoration: underline; text-underline-offset: 4px;
}
.btn--text:active, .btn--text:focus, .btn--text:focus-visible { box-shadow: none; }

/* 尺寸 */
.btn--sm { min-height: 40px; padding: 0 20px; font-size: 15px; gap: 7px; }
.btn--lg { min-height: 58px; padding: 0 36px; font-size: 17px; gap: 10px; }

/* ---------- 7. 首屏 ---------- */
.hero {
  position: relative; min-height: min(760px, 92vh);
  display: flex; align-items: center; padding: calc(var(--header-h) + 70px) 0 96px;
  background: var(--navy-900); overflow: hidden;
}
.hero__bg { position: absolute; inset: 0; }
.hero__bg img { width: 100%; height: 100%; object-fit: cover; opacity: .34; }
.hero__bg::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(100deg, rgba(4, 29, 66, .96) 0%, rgba(6, 42, 97, .88) 42%, rgba(7, 56, 125, .5) 100%),
    linear-gradient(180deg, rgba(4, 29, 66, .55) 0%, rgba(4, 29, 66, 0) 30%);
}
.hero__grid {
  position: absolute; inset: 0; opacity: .09; pointer-events: none;
  background-image:
    linear-gradient(to right, #fff 1px, transparent 1px),
    linear-gradient(to bottom, #fff 1px, transparent 1px);
  background-size: 76px 76px;
  mask-image: linear-gradient(180deg, #000, transparent 78%);
  -webkit-mask-image: linear-gradient(180deg, #000, transparent 78%);
}
.hero__inner { position: relative; z-index: 2; max-width: 720px; }

.hero__badge {
  display: inline-flex; align-items: center; gap: 10px; padding: 7px 16px 7px 9px;
  border: 1px solid rgba(255, 255, 255, .28); border-radius: 999px;
  background: rgba(255, 255, 255, .08); color: #dbe7fa;
  font-size: .82rem; font-weight: 400; letter-spacing: .06em; margin-bottom: 26px;
}
.hero__badge b {
  background: var(--red); color: #fff; border-radius: 999px; padding: 2px 10px;
  font-size: .72rem; letter-spacing: .1em;
}

.hero h1 {
  color: #fff; font-size: clamp(2.1rem, 5.4vw, 3.75rem); line-height: 1.22;
  letter-spacing: .02em; margin-bottom: 10px;
}
.hero h1 em {
  font-style: normal; color: #ffd7d9;
  background: linear-gradient(180deg, transparent 62%, rgba(37, 99, 235, .75) 62%);
}
.hero__slogan {
  font-size: clamp(1rem, 2vw, 1.2rem); color: #b9cde9; font-weight: 400;
  letter-spacing: .3em; margin-bottom: 24px;
}
.hero__desc { color: #a8bfe0; font-size: 1.04rem; max-width: 620px; margin-bottom: 36px; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; }

.hero__stats {
  position: relative; z-index: 2; margin-top: 74px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: rgba(255, 255, 255, .14); border: 1px solid rgba(255, 255, 255, .16);
  border-radius: var(--radius); overflow: hidden; backdrop-filter: blur(6px);
}
.hero__stat { background: rgba(4, 29, 66, .5); padding: 26px 24px; }
.hero__stat b {
  display: block; color: #fff; font-size: clamp(1.5rem, 2.9vw, 2.05rem);
  font-weight: 400; letter-spacing: .02em; line-height: 1.2;
}
.hero__stat b i { font-style: normal; font-size: .55em; margin-left: 4px; color: #ffd7d9; }
.hero__stat > span { color: #a8bfe0; font-size: .86rem; letter-spacing: .05em; }

/* ---------- 8. 内页横幅 ---------- */
.pagehead {
  position: relative; padding: calc(var(--header-h) + 74px) 0 74px;
  background: var(--navy-900); overflow: hidden;
}
.pagehead__bg { position: absolute; inset: 0; }
.pagehead__bg img { width: 100%; height: 100%; object-fit: cover; opacity: .26; }
.pagehead__bg::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(100deg, rgba(4, 29, 66, .95), rgba(7, 56, 125, .62));
}
.pagehead__inner { position: relative; z-index: 2; }
.pagehead h1 { color: #fff; font-size: clamp(1.9rem, 4.4vw, 2.9rem); letter-spacing: .04em; }
.pagehead p { color: #adc3e4; margin: 14px 0 0; max-width: 640px; font-size: 1.02rem; }
.crumb { font-size: .86rem; color: #8fa9ce; margin-bottom: 16px; }
.crumb a { color: #c6d6ee; }
.crumb a:hover { color: #fff; }
.crumb span { margin: 0 8px; opacity: .55; }

/* ---------- 9. 通用卡片 ---------- */
.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px 28px; transition: transform .3s var(--ease), box-shadow .3s var(--ease),
  border-color .3s var(--ease);
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.card h3 { font-size: 1.16rem; margin-bottom: 12px; }
.card p { color: var(--muted); font-size: .95rem; margin: 0; }

.card__icon {
  width: 54px; height: 54px; border-radius: 13px; display: grid; place-items: center;
  background: var(--navy-50); color: var(--navy); margin-bottom: 20px;
  transition: background .3s var(--ease), color .3s var(--ease);
}
.card__icon svg { width: 26px; height: 26px; }
.card:hover .card__icon { background: var(--navy); color: #fff; }
.card__no {
  font-size: .78rem; font-weight: 400; letter-spacing: .18em; color: var(--red);
  display: block; margin-bottom: 12px;
}

/* ---------- 10. 业务板块（深色） ---------- */
.biz {
  background: var(--navy-900); padding: 96px 0; position: relative; overflow: hidden;
}
.biz::before {
  content: ""; position: absolute; top: -140px; right: -120px; width: 460px; height: 460px;
  border-radius: 50%; background: radial-gradient(circle, rgba(7, 56, 125, .55), transparent 68%);
}
.biz__item {
  position: relative; padding: 34px 30px; border-radius: var(--radius);
  background: rgba(255, 255, 255, .045); border: 1px solid rgba(255, 255, 255, .1);
  transition: transform .3s var(--ease), background .3s var(--ease), border-color .3s var(--ease);
  display: flex; flex-direction: column;
}
.biz__item:hover {
  transform: translateY(-6px); background: rgba(255, 255, 255, .08);
  border-color: rgba(255, 255, 255, .26);
}
.biz__item h3 { color: #fff; font-size: 1.22rem; display: flex; align-items: center; gap: 12px; }
.biz__item h3 svg { width: 24px; height: 24px; color: #ff9b9e; flex: 0 0 auto; }
.biz__item .en {
  display: block; font-size: .68rem; letter-spacing: .16em; color: #7f9ac2;
  text-transform: uppercase; margin: 8px 0 12px; font-weight: 400;
}
.biz__item p { color: #9db4d6; font-size: .95rem; margin: 0 0 16px; }
.biz__item ul { margin-top: auto; display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; }
.biz__item li {
  font-size: .8rem; color: #b8cbe6; background: rgba(255, 255, 255, .07);
  border: 1px solid rgba(255, 255, 255, .1); border-radius: 999px; padding: 3px 11px;
  text-align: center;
}

/* ---------- 11. 工程领域 ---------- */
.fields { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line);
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.field { background: #fff; padding: 34px 30px; transition: background .3s var(--ease); }
.field:hover { background: var(--navy-50); }
.field h3 { font-size: 1.1rem; margin-bottom: 10px; display: flex; align-items: center; gap: 10px; }
.field h3 svg { width: 19px; height: 19px; color: var(--red); flex: 0 0 auto; }
.field p { color: var(--muted); font-size: .93rem; margin: 0; }

/* ---------- 12. 数据一览 ---------- */
.metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.metric {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 32px 26px; text-align: center; transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.metric:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.metric b {
  display: block; font-size: clamp(1.7rem, 3.2vw, 2.35rem); font-weight: 400;
  color: var(--navy); line-height: 1.15;
}
.metric b i { font-style: normal; font-size: .48em; margin-left: 3px; color: var(--red); }
.metric > span { color: var(--muted); font-size: .9rem; }

/* ---------- 13. 资质清单 ---------- */
.qual { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.qual__col {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 32px 30px;
}
.qual__col > h3 {
  font-size: 1.1rem; padding-bottom: 16px; margin-bottom: 8px;
  border-bottom: 2px solid var(--navy); display: flex; align-items: center; gap: 10px;
}
.qual__col > h3 svg { width: 20px; height: 20px; color: var(--red); }
.qual__col > .en {
  display: block; font-size: .68rem; letter-spacing: .16em; color: var(--muted-2);
  text-transform: uppercase; font-weight: 400; margin-bottom: 18px;
}
.qual__list li {
  display: flex; align-items: flex-start; gap: 12px; padding: 11px 0;
  border-bottom: 1px dashed var(--line); font-size: .96rem;
}
.qual__list li:last-child { border-bottom: 0; }
.qual__list svg { width: 17px; height: 17px; color: var(--navy-400); flex: 0 0 auto; margin-top: 6px; }
.qual__list b { color: var(--navy); font-weight: 400; }

.notice {
  display: flex; gap: 14px; align-items: flex-start; margin-top: 28px;
  background: var(--gold-50); border: 1px solid #f0e2b8; border-left: 4px solid var(--gold);
  border-radius: var(--radius-sm); padding: 20px 22px; color: #6b5514; font-size: .92rem;
}
.notice svg { width: 20px; height: 20px; flex: 0 0 auto; margin-top: 3px; }
.notice p { margin: 0; }

/* ---------- 14. 时间轴 ---------- */
.timeline { position: relative; max-width: 860px; margin: 0 auto; }
.timeline::before {
  content: ""; position: absolute; left: 50%; top: 6px; bottom: 6px; width: 2px;
  background: linear-gradient(180deg, var(--navy-100), var(--navy), var(--navy-100));
  transform: translateX(-50%);
}
.tl-item { position: relative; width: 50%; padding: 0 46px 40px 0; }
.tl-item:nth-child(even) { margin-left: 50%; padding: 0 0 40px 46px; }
.tl-item::before {
  content: ""; position: absolute; top: 8px; right: -7px; width: 14px; height: 14px;
  border-radius: 50%; background: #fff; border: 3px solid var(--red); z-index: 2;
}
.tl-item:nth-child(even)::before { right: auto; left: -7px; }
.tl-year {
  display: inline-block; font-size: 1.32rem; font-weight: 400; color: var(--navy);
  letter-spacing: .04em; margin-bottom: 8px;
}
.tl-item h3 { font-size: 1.02rem; margin-bottom: 8px; }
.tl-item p { color: var(--muted); font-size: .93rem; margin: 0; }

/* ---------- 15. 组织 / 服务流程 ---------- */
.flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; counter-reset: flow; }
.flow__step { position: relative; text-align: center; padding: 0 6px; }
.flow__step::before {
  counter-increment: flow; content: counter(flow, decimal-leading-zero);
  display: block; font-size: 1.6rem; font-weight: 400; color: var(--navy-100);
  line-height: 1; margin-bottom: 14px;
}
.flow__step:not(:last-child)::after {
  content: ""; position: absolute; top: 15px; left: 62%; right: -38%; height: 1px;
  background: repeating-linear-gradient(90deg, var(--line) 0 7px, transparent 7px 14px);
}
.flow__step h4 { font-size: 1rem; margin-bottom: 8px; }
.flow__step p { font-size: .85rem; color: var(--muted); margin: 0; }

/* ---------- 16. 文化 / 价值观 ---------- */
.culture { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.culture__item {
  text-align: center; padding: 30px 18px; border-radius: var(--radius);
  background: rgba(255, 255, 255, .05); border: 1px solid rgba(255, 255, 255, .11);
  transition: background .3s var(--ease), transform .3s var(--ease);
}
.culture__item:hover { background: rgba(255, 255, 255, .1); transform: translateY(-5px); }
.culture__item b {
  display: block; color: #fff; font-size: 1.5rem; font-weight: 400;
  letter-spacing: .22em; margin-bottom: 12px;
}
.culture__item span { display: block; color: #ff9b9e; font-size: .66rem; letter-spacing: .18em;
  font-weight: 400; margin-bottom: 8px; }
.culture__item p { color: #9db4d6; font-size: .89rem; margin: 0; }

.quote {
  position: relative; border-left: 4px solid var(--red); padding: 4px 0 4px 26px;
  margin: 40px 0 0; font-size: 1.06rem; color: var(--ink-2);
}
.quote cite { display: block; margin-top: 10px; font-style: normal; font-size: .84rem;
  color: var(--muted-2); letter-spacing: .06em; }

/* ---------- 17. QHSE ---------- */
.qhse { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.qhse__col h3 {
  font-size: 1.14rem; margin-bottom: 16px; display: flex; align-items: center; gap: 11px;
  padding-bottom: 14px; border-bottom: 1px solid var(--line);
}
.qhse__col h3 svg { width: 21px; height: 21px; color: var(--navy); }
.qhse__col li {
  display: flex; gap: 11px; align-items: flex-start; font-size: .94rem;
  padding: 7px 0; color: var(--muted);
}
.qhse__col li::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--navy-400);
  flex: 0 0 auto; margin-top: 12px;
}

/* ---------- 18. 优势 ---------- */
.why { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line);
  border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.why__item { background: #fff; padding: 30px 26px; transition: background .3s var(--ease); }
.why__item:hover { background: var(--navy-50); }
.why__item svg { width: 24px; height: 24px; color: var(--red); margin-bottom: 14px; }
.why__item h4 { font-size: 1.02rem; margin-bottom: 9px; }
.why__item p { font-size: .9rem; color: var(--muted); margin: 0; }

/* ---------- 19. 联系 ---------- */
.contact-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 30px; align-items: stretch; }
.contact-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 38px 34px;
}
.contact-list li {
  display: flex; gap: 16px; align-items: flex-start; padding: 18px 0;
  border-bottom: 1px solid var(--line-2);
}
.contact-list li:last-child { border-bottom: 0; }
.contact-list .ico {
  width: 42px; height: 42px; border-radius: 11px; flex: 0 0 auto; display: grid; place-items: center;
  background: var(--navy-50); color: var(--navy);
}
.contact-list .ico svg { width: 19px; height: 19px; }
.contact-list dt { font-size: .8rem; color: var(--muted-2); letter-spacing: .1em; margin-bottom: 2px; }
.contact-list dd { margin: 0; font-size: 1.02rem; font-weight: 400; color: var(--ink); }
.contact-list dd small { display: block; font-weight: 400; font-size: .84rem; color: var(--muted);
  margin-top: 3px; }

.contact-side {
  background: var(--navy-900); border-radius: var(--radius); padding: 38px 34px;
  display: flex; flex-direction: column; justify-content: center; position: relative; overflow: hidden;
}
.contact-side::after {
  content: ""; position: absolute; bottom: -90px; right: -70px; width: 260px; height: 260px;
  border-radius: 50%; background: radial-gradient(circle, rgba(37, 99, 235, .35), transparent 70%);
}
.contact-side h3 { color: #fff; font-size: 1.3rem; margin-bottom: 14px; position: relative; }
.contact-side p { color: #a8bfe0; font-size: .96rem; position: relative; }
.contact-side ul { margin-top: 22px; position: relative; }
.contact-side li {
  display: flex; gap: 11px; align-items: flex-start; color: #c7d7ee; font-size: .93rem;
  padding: 7px 0;
}
.contact-side li::before {
  content: ""; width: 6px; height: 6px; margin-top: 11px; border-radius: 50%;
  background: var(--red); flex: 0 0 auto;
}
.contact-side .btn { margin-top: 28px; align-self: flex-start; position: relative; }

.phone-big {
  display: inline-flex; align-items: baseline; gap: 10px; margin: 6px 0 4px;
  font-size: clamp(1.5rem, 3.4vw, 2.05rem); font-weight: 400; color: var(--navy);
  letter-spacing: .03em;
}
.phone-big svg { width: 22px; height: 22px; align-self: center; color: var(--red); }

/* ---------- 20. CTA 条 ---------- */
.cta-band {
  position: relative; padding: 74px 0; overflow: hidden;
  background:
    linear-gradient(100deg, var(--navy) 0%, var(--navy-700) 55%, var(--navy-600) 100%);
}
.cta-band::before {
  content: ""; position: absolute; inset: 0; opacity: .1;
  background-image:
    linear-gradient(45deg, #fff 25%, transparent 25%, transparent 75%, #fff 75%),
    linear-gradient(45deg, #fff 25%, transparent 25%, transparent 75%, #fff 75%);
  background-size: 34px 34px; background-position: 0 0, 17px 17px;
}
.cta-band__inner {
  position: relative; z-index: 2; display: flex; align-items: center;
  justify-content: space-between; gap: 28px; flex-wrap: wrap;
}
.cta-band h2 { color: #fff; font-size: clamp(1.35rem, 2.8vw, 1.95rem); }
.cta-band p { color: #b9cde9; margin: 8px 0 0; }
.cta-band__actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- 21. FAQ ---------- */
.faq { max-width: 820px; margin: 0 auto; }
.faq__item {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius-sm);
  margin-bottom: 12px; overflow: hidden;
}
.faq__q {
  width: 100%; text-align: left; background: none; border: 0; cursor: pointer;
  padding: 20px 54px 20px 24px; font-size: 1rem; font-weight: 400; color: var(--ink);
  position: relative; font-family: inherit; line-height: 1.6;
}
.faq__q::after {
  content: ""; position: absolute; right: 24px; top: 50%; width: 9px; height: 9px;
  border-right: 2px solid var(--navy); border-bottom: 2px solid var(--navy);
  transform: translateY(-70%) rotate(45deg); transition: transform .3s var(--ease);
}
.faq__item.is-open .faq__q::after { transform: translateY(-20%) rotate(225deg); }
/* FAQ 行是整行按钮：不套用拟物按钮的内外阴影（背景透明会让阴影变成光晕），
   改用底色变化给出反馈，键盘焦点仍由全局 :focus-visible 描边承担 */
.faq__q:hover { background: var(--navy-50); }
.faq__q:active { background: var(--navy-100); }
.faq__q:hover, .faq__q:active, .faq__q:focus { box-shadow: none; }
.faq__a { max-height: 0; overflow: hidden; transition: max-height .35s var(--ease); }
.faq__a p { margin: 0; padding: 0 24px 22px; color: var(--muted); font-size: .94rem; }

/* ---------- 22. 页脚 ---------- */
.footer { background: var(--navy-900); color: #8fa9ce; padding: 66px 0 0; font-size: .92rem; }
.footer__grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 36px; padding-bottom: 48px;
}
.footer .brand__cn { color: #fff; }
.footer__about p { margin: 18px 0 0; max-width: 330px; line-height: 1.9; color: #8fa9ce; }
.footer h4 { color: #fff; font-size: .98rem; margin-bottom: 18px; }
.footer__links li { padding: 5px 0; }
.footer__links a { color: #8fa9ce; }
.footer__links a:hover { color: #fff; }
.footer__contact li { display: flex; gap: 10px; align-items: flex-start; padding: 6px 0; }
.footer__contact svg { width: 16px; height: 16px; flex: 0 0 auto; margin-top: 5px; color: #ff9b9e; }
.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, .1); padding: 22px 0;
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  font-size: .84rem; color: #6f89b1;
}
.footer__bottom a { color: #8fa9ce; }
.footer__disclaimer { max-width: 1000px; }

/* ---------- 23. 进场动画 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: .09s; }
.reveal[data-delay="2"] { transition-delay: .18s; }
.reveal[data-delay="3"] { transition-delay: .27s; }
.reveal[data-delay="4"] { transition-delay: .36s; }

/* ---------- 24. 回到顶部 ---------- */
.totop {
  position: fixed; right: 22px; bottom: 26px; width: 44px; height: 44px; z-index: 900;
  border: 0; border-radius: 12px; cursor: pointer; background: var(--navy); color: #fff;
  display: grid; place-items: center; box-shadow: var(--shadow);
  opacity: 0; visibility: hidden; transform: translateY(12px);
  transition: opacity .3s var(--ease), transform .3s var(--ease), visibility .3s, background .2s;
}
.totop.is-show { opacity: 1; visibility: visible; transform: none; }
.totop:hover { background: var(--red); }
.totop svg { width: 19px; height: 19px; }

/* ---------- 25. 响应式 ---------- */
@media (max-width: 1080px) {
  .nav__link { padding: 9px 11px; font-size: .9rem; }
  .header__cta span { display: none; }
  .header__cta { padding: 11px 13px; }
  .flow { grid-template-columns: repeat(3, 1fr); row-gap: 30px; }
  .flow__step:not(:last-child)::after { display: none; }
}

@media (max-width: 900px) {
  .section { padding: 68px 0; }
  .hero { min-height: auto; padding: calc(var(--header-h) + 56px) 0 72px; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); margin-top: 52px; }
  .grid--4, .metrics, .culture, .qhse { grid-template-columns: repeat(2, 1fr); }
  .fields, .why { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: repeat(2, 1fr); gap: 30px; }
  .timeline::before { left: 7px; transform: none; }
  .tl-item, .tl-item:nth-child(even) { width: 100%; margin-left: 0; padding: 0 0 30px 34px; }
  .tl-item::before, .tl-item:nth-child(even)::before { left: 0; right: auto; }
}

@media (max-width: 780px) {
  .burger { display: block; }
  .header__cta { display: none; }
  .nav {
    position: fixed; top: var(--header-h); right: 0; bottom: 0; width: min(310px, 84vw);
    background: #fff; box-shadow: -12px 0 40px rgba(4, 29, 66, .16);
    transform: translateX(100%); transition: transform .32s var(--ease);
    margin: 0; padding: 18px 16px; overflow-y: auto;
  }
  body.nav-open .nav { transform: none; }
  body.nav-open .nav__scrim { opacity: 1; visibility: visible; }
  .nav__list { flex-direction: column; align-items: stretch; gap: 2px; }
  .nav__link { padding: 13px 14px; font-size: 1rem; }
  .nav__link.is-active::after { display: none; }
  .nav__link.is-active { background: var(--navy-50); }
  .brand__en { display: none; }
}

@media (max-width: 640px) {
  .section { padding: 56px 0; }
  .wrap { padding: 0 18px; }
  .grid--2, .grid--3, .grid--4, .metrics, .culture, .qhse, .fields, .why, .qual,
  .flow, .footer__grid { grid-template-columns: 1fr; }
  .hero__stats { grid-template-columns: 1fr; }
  .hero__actions .btn { width: 100%; }
  .sec-head { margin-bottom: 38px; }
  .card, .qual__col, .contact-card, .contact-side { padding: 26px 22px; }
  .cta-band__inner { flex-direction: column; align-items: flex-start; }
  .cta-band__actions { width: 100%; }
  .cta-band__actions .btn { flex: 1 1 auto; }
  .footer__bottom { flex-direction: column; gap: 8px; }
  .totop { right: 14px; bottom: 16px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important; transition-duration: .001ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

@media print {
  .header, .totop, .nav__scrim, .cta-band, .hero__bg { display: none !important; }
  body { color: #000; }
}


/* ============================================================
   工具提示 tooltip-container / tooltip
   ============================================================ */
.tooltip-container { position: relative; }
.tooltip-container .tooltip {
  position: absolute; bottom: calc(100% + 8px); left: 50%;
  transform: translateX(-50%) translateY(4px);
  padding: 6px 12px; background: #fff; color: var(--ink);
  font-size: .78rem; border-radius: 12px; white-space: nowrap;
  opacity: 0; pointer-events: none; transition: opacity .3s, transform .3s;
  box-shadow: 0 4px 12px rgba(0,0,0,.12); z-index: 100;
}
.tooltip-container .tooltip::before {
  content: ""; position: absolute; top: 100%; left: 50%;
  transform: translateX(-50%); border: 5px solid transparent; border-top-color: var(--surface);
}
/* header 内图标钮：气泡改向下弹（header 贴视口顶，向上弹会被视口裁掉） */
.header .tooltip-container .tooltip {
  bottom: auto;
  top: calc(100% + 8px);
}
.header .tooltip-container .tooltip::before {
  top: auto;
  bottom: 100%;
  border-top-color: transparent;
  border-bottom-color: var(--surface);
}
.tooltip-container:hover .tooltip { opacity: 1; transform: translateX(-50%) translateY(0); }
[data-theme="dark"] .tooltip-container .tooltip { background: #1e293b; color: #e2e8f0; }
[data-theme="dark"] .tooltip-container .tooltip::before { border-top-color: #1e293b; }

/* ============================================================
   全站背景 城市街景（3% 透明度）
   ============================================================ */
/* BROADSIDE：纯纸底，移除城市照片背景 */
body { isolation: isolate; }
body::before { content: none; }

/* ============================================================
   BROADSIDE 层 · main.css（排版 / 首屏 / 页头页脚 / 按钮悬停）
   ============================================================ */

/* 小标签走等宽大写 */
.sec-head__eyebrow { font-family: var(--mono); font-weight: 400; }

/* 章节大标题：荧光笔扫底 */
.sec-head h2 {
  display: inline;
  background: linear-gradient(transparent 58%, var(--gold) 58% 92%);
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
}
[data-theme="dark"] .sec-head h2 {
  background: linear-gradient(transparent 58%, var(--navy-600) 58% 92%);
}

/* ---------- 首屏平面化 ---------- */
.hero__bg::after { background: rgba(17, 17, 17, .8); }
.hero h1 em { color: var(--gold); background: none; }
.hero__slogan { color: #E4DFD2; }
.hero__desc { color: #C9C3B4; }
.hero__badge {
  background: var(--gold); color: #111111;
  border: 2px solid #111111;
  font-family: var(--mono); font-size: .72rem;
  text-transform: uppercase; letter-spacing: .12em;
}
.hero__badge b { background: #111111; color: #fff; }
.hero__stats {
  background: rgba(255, 255, 255, .5);
  border-color: rgba(255, 255, 255, .7);
  backdrop-filter: none; -webkit-backdrop-filter: none;
}
.hero__stat { background: rgba(17, 17, 17, .82); }
.hero__stat b i { color: var(--gold); }
.hero__stat > span { color: #C9C3B4; }

/* ---------- 页头平面化 + 贴纸 ---------- */
.pagehead__bg::after { background: rgba(17, 17, 17, .88); }
.pagehead p { color: #E4DFD2; }
.crumb { color: #A8A296; }
.crumb a { color: #F2EEE4; }
.crumb a:hover { color: var(--gold); }
.pagehead__inner { position: relative; }
.pagehead__inner::after {
  content: "FLAT · LOUD · PRINTED";
  position: absolute; right: 0; top: 0;
  transform: rotate(3deg);
  background: #1F3DFF; color: #fff;
  border: 2px solid #111111;
  font-family: var(--mono); font-size: .66rem;
  letter-spacing: .2em; padding: 7px 13px;
  pointer-events: none; z-index: 3;
}
@media (max-width: 760px) {
  .pagehead__inner::after { display: none; }
}

/* ---------- 页脚 ---------- */
.footer { border-top: 7px solid var(--gold); color: #C9C3B4; }
.footer__about p, .footer__links a, .footer__bottom a { color: #C9C3B4; }
.footer__links a:hover { color: var(--gold); }

/* ---------- 按钮悬停（令牌翻转：黑底反转 / 荧光黄） ---------- */
.btn:hover,
button:hover,
input[type="submit"]:hover, input[type="button"]:hover, input[type="reset"]:hover {
  --btn-bg: #111111;
  --btn-fg: #ffffff;
  --btn-border: #111111;
  background-image: none;
}
.btn--primary:hover { --btn-bg: #D8F14B; --btn-fg: #111111; --btn-border: #111111; }
.btn--navy:hover { --btn-bg: #D8F14B; --btn-fg: #111111; --btn-border: #111111; }
.btn--outline:hover { --btn-bg: #D8F14B; --btn-fg: #111111; --btn-border: #111111; }
.btn--ghost:hover { --btn-bg: #ffffff; --btn-fg: #111111; --btn-border: #ffffff; }
.btn--text:hover { --btn-bg: transparent; --btn-fg: #FF3D1F; --btn-border: transparent; }

/* ---------- 宽幅主按钮 · 偏移式（Uiverse.io broadside-btn）：90ms 硬缓动、上浮/下压、主按钮 hover 黑底荧光字 ---------- */
.btn,
.header__cta {
  min-height: 52px;
  gap: .5rem;
  font-weight: 700;
  transition: transform 90ms cubic-bezier(.2, .9, .2, 1),
    background-color 90ms cubic-bezier(.2, .9, .2, 1),
    color 90ms cubic-bezier(.2, .9, .2, 1),
    border-color 90ms cubic-bezier(.2, .9, .2, 1),
    box-shadow 90ms cubic-bezier(.2, .9, .2, 1);
}
.btn:hover,
.header__cta:hover { transform: translate(-2px, -2px); }
.btn:active,
.header__cta:active { transform: translate(2px, 2px); }
.btn--primary:hover { --btn-bg: #111111; --btn-fg: var(--gold); --btn-border: #111111; }
.header__cta:hover { color: var(--gold); }

/* ===== A. 全站排版审计修复：深底区字色收敛 + 杂色光斑清除 ===== */
.biz::before, .contact-side::after { content: none; }        /* 蓝色光斑 */
.biz__item h3 svg,
.culture__item span,
.footer__contact svg { color: var(--red); }                  /* 粉 #ff9b9e → 信号红 */
.biz__item .en { color: #A8A296; }                            /* 小标 */
.biz__item p, .biz__item li,
.culture__item p,
.contact-side p, .contact-side li { color: #C9C3B4; }        /* 次字 */
.cta-band {                                                   /* 钴蓝三段渐变 → 黑平涂 */
  background: #111111;
  border-top: 2px solid var(--line);
  border-bottom: 2px solid var(--line);
}
.cta-band p { color: #C9C3B4; }
[data-theme="dark"] .tooltip-container .tooltip { background: var(--surface); color: var(--ink); }
[data-theme="dark"] .tooltip-container .tooltip::before { border-top-color: var(--surface); }