/* =========================================================
   河南唐宇装饰 · 全局样式（DARK · 沉浸式深色 + 渐变 + 全宽）
   参考 deyuad.com 设计语言：克制配色 + 巨型英文 display 锚点
   + 强双语 + 细网格 + 编号节奏。近黑底 + 米白字 + 橙红 #ff5722 单一强调色。
   ========================================================= */

:root {
  /* ===== 颜色 Color（近黑底 / 米白字 / 橙红强调） ===== */
  --color-bg: #0a0a0b;            /* 页面基色，近黑 */
  --color-bg-2: #121215;          /* 略亮的暗面板 */
  --color-paper: #161619;         /* 卡片 / 表面（暗） */
  --color-paper-dim: #101012;     /* 更暗的表面 */
  --color-ink: #f4f3f0;           /* 主文字 = 米白 */
  --color-ink-soft: #cfcdc8;      /* 次文字 */
  --color-muted: #9a9893;         /* 弱化文字 */
  --color-muted-2: #6c6a65;       /* 更弱文字 */
  --color-line: #26262b;          /* 发丝边框 */
  --color-line-strong: #38383f;
  --color-accent: #ff5722;        /* 橙红强调 */
  --color-accent-dark: #e64a19;
  --color-on-accent: #0a0a0b;     /* 强调按钮上的文字（暗） */
  --color-bg-grid: rgba(255,255,255,0.045);

  /* ===== 字体 Font ===== */
  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB",
               "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-display: "Space Grotesk", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-en: "Inter", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Roboto Mono", Menlo,
               Consolas, "Courier New", monospace;

  /* ===== 字号 Type（桌面） ===== */
  --fs-h1: 60px;  --fw-h1: 700;  --lh-h1: 1.08;
  --fs-h2: 38px;  --fw-h2: 700;  --lh-h2: 1.18;
  --fs-h3: 22px;  --fw-h3: 600;  --lh-h3: 1.3;
  --fs-h4: 18px;  --fw-h4: 600;  --lh-h4: 1.4;
  --fs-body: 16px; --lh-body: 1.75;
  --fs-lead: 18px; --lh-lead: 1.75;
  --fs-cap: 14px;  --lh-cap: 1.5;
  --fs-micro: 12px; --ls-micro: 0.22em;
  --fs-display: 64px;

  /* ===== 间距 Spacing（8px 基准，留白加大） ===== */
  --space-1: 4px;  --space-2: 8px;  --space-3: 12px; --space-4: 16px;
  --space-5: 24px; --space-6: 32px; --space-7: 48px;
  --space-8: 64px; --space-9: 128px; --space-10: 176px;

  /* ===== 布局 Layout（全宽，内栏 1480） ===== */
  --container-max: 1480px;
  --container-pad: clamp(20px, 5vw, 80px);
  --gap: 24px;

  /* ===== 圆角 Radius ===== */
  --radius-sm: 3px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --radius-pill: 999px;

  /* ===== 阴影 Shadow（暗底用深阴影 + 强调辉光） ===== */
  --shadow-1: 0 2px 10px rgba(0,0,0,0.45);
  --shadow-2: 0 26px 60px rgba(0,0,0,0.6);
  --shadow-red: 0 12px 34px rgba(255,87,34,0.35);

  /* ===== 过渡 Transition ===== */
  --transition-fast: 0.15s ease;
  --transition: 0.28s cubic-bezier(0.22,1,0.36,1);
  --transition-slow: 0.5s cubic-bezier(0.22,1,0.36,1);

  /* ===== 导航高度 ===== */
  --nav-h: 76px;
}

/* 移动端字号覆盖（<768px） */
@media (max-width: 767px) {
  :root {
    --fs-h1: 34px; --fs-h2: 27px; --fs-h3: 19px; --fs-h4: 16px;
    --fs-body: 15px; --fs-lead: 16px; --fs-cap: 13px; --fs-micro: 11px;
    --fs-display: 44px;
    --container-pad: 16px;
    --space-9: 80px;
  }
}
/* 平板中段（768–1023px） */
@media (min-width: 768px) and (max-width: 1023px) {
  :root {
    --fs-h1: 46px; --fs-h2: 32px; --fs-display: 56px;
    --space-9: 96px;
  }
}

/* =========================================================
   基础重置
   ========================================================= */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; background: var(--color-bg); }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--color-ink);
  background: transparent;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
/* 全站雪山底图：固定视差层，五个页面各用一座不同构图的黑白雪山 */
body::before {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background: url("../assets/bg-home.jpg?v=10") center / cover no-repeat;
  background-color: var(--color-bg);
  /* 现代浏览器加载 2560x1440 高清 WebP，旧浏览器回退 JPEG（同一时刻只下载一种） */
  background-image: -webkit-image-set(url("../assets/bg-home.webp?v=10") type("image/webp"), url("../assets/bg-home.jpg?v=10") type("image/jpeg"));
  background-image: image-set(url("../assets/bg-home.webp?v=10") type("image/webp"), url("../assets/bg-home.jpg?v=10") type("image/jpeg"));
}
body[data-page="cases"]::before    { background-image: -webkit-image-set(url("../assets/bg-cases.webp?v=13") type("image/webp"), url("../assets/bg-cases.jpg?v=13") type("image/jpeg"));
  background-image: image-set(url("../assets/bg-cases.webp?v=13") type("image/webp"), url("../assets/bg-cases.jpg?v=13") type("image/jpeg")); }
body[data-page="about"]::before    { background-image: -webkit-image-set(url("../assets/bg-about.webp?v=10") type("image/webp"), url("../assets/bg-about.jpg?v=10") type("image/jpeg"));
  background-image: image-set(url("../assets/bg-about.webp?v=10") type("image/webp"), url("../assets/bg-about.jpg?v=10") type("image/jpeg")); }
body[data-page="services"]::before { background-image: -webkit-image-set(url("../assets/bg-services.webp?v=10") type("image/webp"), url("../assets/bg-services.jpg?v=10") type("image/jpeg"));
  background-image: image-set(url("../assets/bg-services.webp?v=10") type("image/webp"), url("../assets/bg-services.jpg?v=10") type("image/jpeg")); }
body[data-page="contact"]::before  { background-image: -webkit-image-set(url("../assets/bg-contact.webp?v=10") type("image/webp"), url("../assets/bg-contact.jpg?v=10") type("image/jpeg"));
  background-image: image-set(url("../assets/bg-contact.webp?v=10") type("image/webp"), url("../assets/bg-contact.jpg?v=10") type("image/jpeg")); }
img { max-width: 100%; display: block; }
a { color: inherit; }
button { font-family: inherit; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
.accent { color: var(--color-accent); }
.skip-link {
  position: absolute; left: -9999px; top: 0; z-index: 300;
  background: var(--color-accent); color: var(--color-on-accent); padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
}
.skip-link:focus { left: var(--space-4); top: var(--space-4); }

/* =========================================================
   布局工具
   ========================================================= */
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 var(--container-pad); }
.section { padding: var(--space-9) 0; position: relative; background: rgba(10,10,11,0.62); }
.section--dim { background: rgba(13,13,15,0.68); }
.section--dark { background: rgba(10,10,11,0.64); color: var(--color-ink); }
/* 内页首屏：顶部近乎全透让雪山透出，向下更长距离、更柔和地过渡到常规深色遮罩 */
#app > .section:first-child {
  background: linear-gradient(180deg,
    rgba(10,10,11,0) 0,
    rgba(10,10,11,0.14) 200px,
    rgba(10,10,11,0.40) 420px,
    rgba(10,10,11,0.62) 620px);
}

/* 区块通用头部（保留兼容） */
.section__head { max-width: 760px; margin: 0 auto var(--space-7); text-align: center; }
.section__eyebrow {
  font-family: var(--font-mono); font-size: var(--fs-micro); font-weight: 500;
  letter-spacing: var(--ls-micro); text-transform: uppercase;
  color: var(--color-accent); display: inline-block; margin-bottom: var(--space-3);
}
.section__title { font-size: var(--fs-h2); font-weight: var(--fw-h2); line-height: var(--lh-h2); margin: 0 0 var(--space-4); }
.section__lead { font-size: var(--fs-lead); color: var(--color-muted); margin: 0; }

/* =========================================================
   编辑式区块头部（巨型英文锚点 + 中文副标）
   ========================================================= */
.sec-head { max-width: 860px; margin: 0 auto var(--space-8); text-align: center; position: relative; }
.sec-head--left { text-align: left; margin-left: 0; }
.sec-head__index {
  font-family: var(--font-mono); font-size: var(--fs-micro); font-weight: 500;
  letter-spacing: 0.24em; text-transform: uppercase; color: var(--color-accent);
  display: inline-flex; align-items: center; gap: var(--space-2); margin-bottom: var(--space-4);
}
.sec-head__index::before {
  content: ""; width: 28px; height: 1px; background: var(--color-accent); display: inline-block;
}
.sec-head__display {
  display: block;
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(44px, 9vw, 116px); line-height: 0.92;
  letter-spacing: -0.02em; text-transform: uppercase;
  color: var(--color-ink); margin: 0 0 var(--space-5);
}
.sec-head__title { font-size: var(--fs-h2); font-weight: 700; line-height: 1.15; margin: 0 0 var(--space-4); letter-spacing: -0.01em; }
.sec-head__lead { font-size: var(--fs-lead); color: var(--color-muted); margin: 0 auto; max-width: 660px; line-height: 1.7; }
.sec-head--left .sec-head__lead { margin-left: 0; }
/* 浅色区块头部（暗底同样适用） */
.section--dark .sec-head__display { color: var(--color-ink); }
.section--dark .sec-head__title { color: var(--color-ink); }
.section--dark .sec-head__lead { color: var(--color-muted); }

/* =========================================================
   细网格纹理（编辑感结构 / 暗底浅线）
   ========================================================= */
.bg-grid {
  position: absolute; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(to right, var(--color-bg-grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--color-bg-grid) 1px, transparent 1px);
  background-size: 80px 80px;
  -webkit-mask-image: radial-gradient(120% 100% at 50% 0%, #000 35%, transparent 100%);
          mask-image: radial-gradient(120% 100% at 50% 0%, #000 35%, transparent 100%);
}
/* 背景呼吸辉光：只动 opacity + transform（GPU 合成），不触发重排，也不影响文字可读性 */
.bg-grid::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(60% 55% at 50% 0%, rgba(255,87,34,0.16), transparent 70%);
  animation: gridGlow 11s ease-in-out infinite;
  will-change: opacity, transform;
}
@keyframes gridGlow {
  0%, 100% { opacity: 0.35; transform: translate3d(0, 0, 0) scale(1); }
  50%      { opacity: 0.90; transform: translate3d(0, 12px, 0) scale(1.06); }
}

/* =========================================================
   导航 Nav（玻璃拟态）
   ========================================================= */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--nav-h);
  display: flex; align-items: center;
  padding: 0 var(--container-pad);
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-bottom: 1px solid transparent;
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
}
/* 顶部柔和渐变遮罩：很轻的一层，让雪山照片从导航后面透出，同时保证文字/按钮清晰可读 */
.nav::before {
  content: ""; position: absolute; left: 0; right: 0; top: 0; height: 112px; z-index: -1;
  pointer-events: none; transition: opacity var(--transition);
  background: linear-gradient(180deg, rgba(4,4,6,0.22) 0%, rgba(4,4,6,0.12) 44%, rgba(4,4,6,0.04) 76%, rgba(4,4,6,0) 100%);
}
.nav.scrolled::before { opacity: 0; }
/* 顶部未滚动：完全透明，让雪山铺满整屏（含字标 / 导航 / 立即咨询） */
.nav:not(.scrolled) .nav__logo__cn,
.nav:not(.scrolled) .nav__logo__sub,
.nav:not(.scrolled) .nav__link { text-shadow: 0 2px 14px rgba(0,0,0,0.55); }
.nav.scrolled { background: rgba(10,10,11,0.85); backdrop-filter: blur(18px) saturate(160%); -webkit-backdrop-filter: blur(18px) saturate(160%); box-shadow: 0 8px 30px rgba(0,0,0,0.5); border-bottom-color: var(--color-line-strong); }
.nav__inner { display: flex; align-items: center; width: 100%; max-width: var(--container-max); margin: 0 auto; }
/* 品牌字标：中文主标「唐宇装饰」+ 等宽英文副标（取代原 logo 图片） */
.nav__logo {
  display: inline-flex; flex-direction: column; align-items: flex-start; gap: 3px;
  padding: 4px 0; text-decoration: none; color: var(--color-ink);
}
.nav__logo__cn {
  font-family: var(--font-sans);
  font-size: 23px; font-weight: 700; line-height: 1;
  letter-spacing: 0.14em; margin-right: -0.14em;
  color: var(--color-ink);
  transition: color var(--transition-fast);
}
.nav__logo__sub {
  position: relative; display: block;
  font-family: var(--font-mono);
  font-size: 9.5px; font-weight: 500; line-height: 1;
  letter-spacing: 0.32em; margin-right: -0.32em;
  text-transform: uppercase; color: var(--color-accent);
  padding-left: 22px;
}
.nav__logo__sub::before {
  content: ""; position: absolute; left: 0; top: 50%;
  width: 15px; height: 2px; transform: translateY(-50%);
  background: var(--color-accent);
  transition: width var(--transition-fast);
}
.nav__logo:hover .nav__logo__cn { color: var(--color-accent); }
.nav__logo:hover .nav__logo__sub::before { width: 22px; }
.nav__menu { display: flex; gap: var(--space-6); margin-left: auto; align-items: center; }
.nav__link {
  font-size: 15px; color: var(--color-ink); text-decoration: none;
  position: relative; padding: var(--space-2) 0; transition: color var(--transition-fast);
  background: none; border: none; cursor: pointer; letter-spacing: 0.01em;
}
.nav__link:hover { color: var(--color-accent); }
.nav__link.active { color: var(--color-accent); }
.nav__link.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px;
  height: 2px; background: var(--color-accent);
}
.nav__cta { margin-left: var(--space-5); }
.nav__burger {
  display: none; margin-left: auto; width: 44px; height: 44px;
  background: none; border: none; cursor: pointer; flex-direction: column;
  justify-content: center; gap: 6px; padding: 10px;
}
.nav__burger span { display: block; height: 2px; width: 24px; background: var(--color-ink); transition: background var(--transition-fast); }
.nav__burger:hover span { background: var(--color-accent); }

/* 移动抽屉 */
.nav__drawer {
  position: fixed; inset: 0; z-index: 99; background: var(--color-paper);
  display: none; flex-direction: column; padding: calc(var(--nav-h) + var(--space-5)) var(--container-pad) var(--space-7);
}
.nav__drawer.open { display: flex; }
.nav__drawer .nav__link { font-size: 20px; padding: var(--space-4) 0; border-bottom: 1px solid var(--color-line); text-align: left; width: 100%; }
.nav__drawer .nav__cta { margin: var(--space-6) 0 0; }

/* =========================================================
   按钮 Button
   ========================================================= */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  height: 50px; padding: 0 var(--space-6);
  font-size: 15px; font-weight: 600; line-height: 1; letter-spacing: 0.01em;
  border-radius: var(--radius-pill);
  border: 1px solid transparent; cursor: pointer;
  text-decoration: none; transition: all var(--transition-fast);
  white-space: nowrap;
}
.btn--primary { background: var(--color-accent); color: var(--color-on-accent); }
.btn--primary:hover { background: var(--color-accent-dark); box-shadow: 0 14px 36px rgba(255,87,34,0.45); transform: translateY(-2px); }
.btn--primary:active { transform: translateY(0); }
.btn--secondary { background: transparent; color: var(--color-ink); border-color: var(--color-line-strong); }
.btn--secondary:hover { background: rgba(255,255,255,0.06); color: var(--color-ink); }
.btn--ghost { background: transparent; color: var(--color-ink); border-color: var(--color-line-strong); }
.btn--ghost:hover { border-color: var(--color-ink); }
.btn--sm { height: 42px; padding: 0 var(--space-5); font-size: 14px; }
.btn--block { width: 100%; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* =========================================================
   Hero 首屏（沉浸式深色渐变）
   ========================================================= */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  display: flex; align-items: center;
  background: transparent;
  color: var(--color-ink);
  padding: var(--nav-h) 0 var(--space-8);
  overflow: hidden;
}
.hero__grid { display: none; }
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background:
    radial-gradient(62% 44% at 50% 46%, rgba(10,10,11,0.68) 0%, rgba(10,10,11,0.34) 58%, transparent 80%),
    linear-gradient(180deg, rgba(10,10,11,0.14) 0%, rgba(10,10,11,0.10) 40%, rgba(10,10,11,0.36) 78%, rgba(10,10,11,0.62) 100%);
}
.hero__inner { position: relative; z-index: 1; width: 100%; text-align: center; }
.hero__brand {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(44px, 14.5vw, 215px);
  line-height: 0.9; letter-spacing: 0.28em;
  transform: translateX(0.14em);
  text-transform: uppercase;
  color: var(--color-ink);
  text-shadow: 0 4px 40px rgba(0,0,0,0.5);
  margin: 0;
}
.hero__slogan {
  margin: var(--space-5) auto 0;
  font-size: clamp(13px, 1.1vw, 17px);
  line-height: 1.65;
  color: rgba(244,243,240,0.88);
  max-width: 980px;
  text-shadow: 0 2px 18px rgba(0,0,0,0.55);
}
.hero__sub {
  margin: var(--space-4) auto 0;
  font-size: clamp(12px, 0.95vw, 14px);
  line-height: 1.7;
  color: rgba(244,243,240,0.62);
  max-width: 760px;
  text-shadow: 0 2px 18px rgba(0,0,0,0.55);
}
.hero__eyebrow { font-family: var(--font-mono); font-size: var(--fs-micro); letter-spacing: 0.24em; text-transform: uppercase; color: var(--color-muted); margin-bottom: var(--space-5); }
.hero__display {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(38px, 7.5vw, 92px); line-height: 0.94; letter-spacing: -0.02em;
  text-transform: uppercase; color: var(--color-ink); margin: 0 0 var(--space-4);
}
.hero__display .accent { color: var(--color-accent); }
.hero__title { font-size: var(--fs-h1); font-weight: var(--fw-h1); line-height: var(--lh-h1); margin: 0 0 var(--space-5); letter-spacing: -0.01em; color: var(--color-ink); }
.hero__title .accent { color: var(--color-accent); }
.hero__lead { font-size: var(--fs-lead); color: var(--color-muted); margin: 0 0 var(--space-7); max-width: 640px; line-height: 1.7; }
.hero__lead-en { display: block; margin-top: var(--space-2); font-family: var(--font-en); font-size: 14px; letter-spacing: 0.01em; color: var(--color-muted-2); }
.hero__cta { display: flex; gap: var(--space-4); flex-wrap: wrap; }
.hero__badge { margin-top: var(--space-7); font-family: var(--font-mono); font-size: var(--fs-micro); letter-spacing: 0.12em; color: var(--color-muted); }
.hero__badge span { color: var(--color-accent); }
.hero__scroll { position: absolute; left: 50%; bottom: var(--space-6); transform: translateX(-50%); z-index: 1; display: flex; flex-direction: column; align-items: center; gap: var(--space-2); font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.3em; color: var(--color-muted-2); }
.hero__scroll i { width: 1px; height: 38px; background: linear-gradient(var(--color-muted-2), transparent); animation: scrollPulse 2s ease-in-out infinite; }
@keyframes scrollPulse { 0%,100% { opacity: 0.3; transform: scaleY(0.6); } 50% { opacity: 1; transform: scaleY(1); } }

/* =========================================================
   数据看板 DataBoard
   ========================================================= */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap); }
.stat { text-align: center; padding: var(--space-6) var(--space-4); position: relative; }
.stat + .stat::before { content: ""; position: absolute; left: 0; top: 18%; height: 64%; width: 1px; background: var(--color-line); }
.section--dark .stat + .stat::before { background: var(--color-line-strong); }
.stat__num {
  font-family: var(--font-display); font-size: clamp(48px, 6vw, 76px); font-weight: 700;
  line-height: 1; letter-spacing: -0.03em; color: var(--color-accent);
}
.stat__num--ink { color: var(--color-ink); }
.stat__unit { font-size: 30px; font-weight: 700; color: inherit; margin-left: 2px; }
.stat__label { font-size: 14px; color: var(--color-muted); margin-top: var(--space-3); letter-spacing: 0.04em; }
.stat__en { display: block; font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.2em; text-transform: uppercase; color: var(--color-muted-2); margin-top: 6px; }
.section--dark .stat__num--ink { color: var(--color-ink); }
.section--dark .stat__label { color: var(--color-muted); }
.section--dark .stat__en { color: var(--color-muted-2); }

/* =========================================================
   网格
   ========================================================= */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--gap); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--gap); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--gap); }
.grid-5 { display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--gap); }

/* =========================================================
   业务线入口卡片（编辑式编号）
   ========================================================= */
.biz { position: relative; display: block; text-align: left; background: var(--color-paper); border: 1px solid var(--color-line); border-radius: var(--radius-lg); padding: var(--space-6); cursor: pointer; transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition); text-decoration: none; overflow: hidden; }
.biz::before { content: ""; position: absolute; left: 0; top: 0; width: 3px; height: 0; background: var(--color-accent); transition: height var(--transition); }
.biz:hover { transform: translateY(-6px); box-shadow: var(--shadow-2), inset 0 2px 0 0 var(--color-accent); border-color: var(--color-line-strong); }
.biz:hover::before { height: 100%; }
.biz__num { font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.2em; color: var(--color-accent); display: block; margin-bottom: var(--space-4); }
.biz__icon { font-size: 30px; line-height: 1; margin-bottom: var(--space-4); }
.biz__title { font-size: var(--fs-h3); font-weight: var(--fw-h3); margin: 0 0 var(--space-2); color: var(--color-ink); }
.biz__en { display: block; font-family: var(--font-en); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-muted-2); margin-bottom: var(--space-4); }
.biz__desc { font-size: 15px; color: var(--color-muted); margin: 0 0 var(--space-4); line-height: 1.7; }
.biz__more { font-size: 14px; color: var(--color-accent); font-weight: 600; }

/* =========================================================
   设计 + 装修一体化（轻量卖点卡）
   ========================================================= */
.integration { position: relative; background: var(--color-paper); border: 1px solid var(--color-line); border-radius: var(--radius-lg); padding: var(--space-6); transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition); }
.integration:hover { transform: translateY(-6px); box-shadow: var(--shadow-2), inset 0 2px 0 0 var(--color-accent); border-color: var(--color-line-strong); }
.integration__num { display: block; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.2em; color: var(--color-accent); margin-bottom: var(--space-4); }
.integration__title { font-size: var(--fs-h4); font-weight: 600; line-height: 1.4; color: var(--color-ink); margin: 0 0 var(--space-3); }
.integration__desc { font-size: 14px; line-height: 1.75; color: var(--color-muted); margin: 0; }
.integration__cta { text-align: center; margin-top: var(--space-7); }

/* =========================================================
   案例卡片 Case（编辑式）
   ========================================================= */
.card--case {
  position: relative; background: var(--color-paper); border: 1px solid var(--color-line);
  border-radius: var(--radius-lg); overflow: hidden; cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  display: flex; flex-direction: column; text-align: left; padding: 0; width: 100%;
}
.card--case:hover { transform: translateY(-6px); box-shadow: var(--shadow-2), inset 0 2px 0 0 var(--color-accent); border-color: var(--color-line-strong); }
.card--case__media { position: relative; overflow: hidden; }
.card--case__cover {
  aspect-ratio: 4 / 3; object-fit: cover; width: 100%; display: block;
  background: linear-gradient(135deg, #202024, #0d0d0f);
  transition: transform var(--transition-slow);
}
.card--case:hover .card--case__cover { transform: scale(1.05); }
.card--case__index { position: absolute; top: var(--space-4); left: var(--space-4); z-index: 2; font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.18em; color: #fff; mix-blend-mode: difference; }
.card--case__en { position: absolute; top: var(--space-4); right: var(--space-4); z-index: 2; font-family: var(--font-en); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: rgba(255,255,255,0.9); }
.card--case__body { padding: var(--space-5); flex: 1; display: flex; flex-direction: column; }
.card--case__title { font-size: 18px; font-weight: 600; color: var(--color-ink); margin: 0 0 var(--space-3); }
.card--case__meta { font-size: 13px; color: var(--color-muted); margin-top: auto; display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: center; }

/* 占位封面（无图） */
.cover-ph {
  position: relative; aspect-ratio: 4/3; background: linear-gradient(135deg, #202024, #0d0d0f);
  display: flex; align-items: center; justify-content: center; overflow: hidden;
}
.cover-ph::before { content: ""; position: absolute; left: 0; top: 0; width: 16px; height: 16px; border-left: 2px solid var(--color-accent); border-top: 2px solid var(--color-accent); }
.cover-ph::after { content: ""; position: absolute; right: 0; bottom: 0; width: 16px; height: 16px; border-right: 2px solid var(--color-accent); border-bottom: 2px solid var(--color-accent); }
.cover-ph span { font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.15em; color: rgba(255,255,255,0.75); text-align: center; padding: 0 var(--space-4); }

/* 服务卡（编辑式） */
.card--service {
  position: relative; background: var(--color-paper); border: 1px solid var(--color-line);
  border-radius: var(--radius-lg); padding: var(--space-6); margin-bottom: var(--space-5);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card--service:hover { transform: translateY(-6px); box-shadow: var(--shadow-2), inset 0 2px 0 0 var(--color-accent); border-color: var(--color-line-strong); }
.card--service__top { display: flex; align-items: center; gap: var(--space-3); margin-bottom: var(--space-4); }
.card--service__num { font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.16em; color: var(--color-accent); }
.card--service__icon { font-size: 28px; margin-left: auto; }
.card--service__title { font-size: var(--fs-h3); font-weight: var(--fw-h3); margin: 0 0 var(--space-2); }
.card--service__en { display: block; font-family: var(--font-en); font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-muted-2); margin-bottom: var(--space-4); }
.card--service__summary { color: var(--color-muted); font-size: 15px; margin: 0 0 var(--space-4); line-height: 1.7; }
.card--service__detail { font-size: 14px; color: var(--color-ink); line-height: 1.85; border-top: 1px solid var(--color-line); padding-top: var(--space-4); }
.card--service__toggle { margin-top: var(--space-4); background: none; border: none; color: var(--color-accent); font-size: 14px; font-weight: 600; cursor: pointer; padding: 0; }

/* =========================================================
   标签 Badge
   ========================================================= */
.badge { display: inline-flex; align-items: center; height: 24px; padding: 0 var(--space-3); font-size: 12px; font-weight: 500; border-radius: var(--radius-pill); }
.badge--dark { background: var(--color-paper-dim); color: var(--color-ink); border: 1px solid var(--color-line); }
.badge--red-outline { background: transparent; color: var(--color-accent); border: 1px solid var(--color-accent); }
.badge--line { background: transparent; color: var(--color-muted); border: 1px solid var(--color-line); }
.badge--status-todo { background: transparent; color: var(--color-muted); border: 1px solid var(--color-line); }
.badge--status-done { background: var(--color-accent); color: var(--color-on-accent); }

/* =========================================================
   筛选 / 搜索栏
   ========================================================= */
.filterbar { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-5); }
.filterbar__tab {
  height: 40px; padding: 0 var(--space-5); border-radius: var(--radius-pill);
  background: transparent; border: 1px solid var(--color-line); color: var(--color-ink);
  font-size: 14px; cursor: pointer; transition: all var(--transition-fast);
}
.filterbar__tab:hover { border-color: var(--color-line-strong); }
.filterbar__tab.active { background: var(--color-accent); color: var(--color-on-accent); border-color: var(--color-accent); }
.toolbar { display: flex; gap: var(--space-4); flex-wrap: wrap; align-items: center; justify-content: space-between; margin-bottom: var(--space-6); }
.searchbox { position: relative; flex: 1; min-width: 240px; max-width: 420px; }
.searchbox input { width: 100%; height: 48px; padding: 0 var(--space-4) 0 44px; border: 1px solid var(--color-line); border-radius: var(--radius-pill); font-size: 15px; color: var(--color-ink); background: var(--color-bg-2); transition: border-color var(--transition-fast), box-shadow var(--transition-fast); }
.searchbox input:focus { outline: none; border-color: var(--color-accent); box-shadow: 0 0 0 3px rgba(255,87,34,0.18); }
.searchbox svg { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); }

/* =========================================================
   表单 Form
   ========================================================= */
.field { margin-bottom: var(--space-5); }
.field__label { display: block; font-size: 14px; color: var(--color-ink); margin-bottom: var(--space-2); font-weight: 500; }
.field__input, .field__select, .field__textarea {
  width: 100%; height: 48px; padding: 0 var(--space-4);
  font-size: 15px; color: var(--color-ink);
  background: var(--color-bg-2); border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}
.field__textarea { height: auto; min-height: 120px; padding: var(--space-4); resize: vertical; line-height: 1.6; }
.field__input::placeholder, .field__textarea::placeholder { color: var(--color-muted-2); }
.field__input:focus, .field__select:focus, .field__textarea:focus { outline: none; border-color: var(--color-accent); box-shadow: 0 0 0 3px rgba(255,87,34,0.18); }
.field--error .field__input, .field--error .field__select, .field--error .field__textarea { border-color: var(--color-accent); }
.field__error-msg { display: none; color: var(--color-accent); font-size: 13px; margin-top: var(--space-2); }
.field--error .field__error-msg { display: block; }
/* 字段辅助提示（常显的灰字说明，出错时让位给错误文案） */
.field__hint { font-size: 12px; line-height: 1.5; color: var(--color-muted); margin-top: var(--space-2); }
.field--error .field__hint { display: none; }
/* 带单位后缀的输入框（项目面积 ㎡） */
.field__suffix-wrap { position: relative; }
.field__input--suffix { padding-right: 46px; }
.field__suffix {
  position: absolute; right: var(--space-4); top: 50%; transform: translateY(-50%);
  font-family: var(--font-mono); font-size: 13px; letter-spacing: 0.06em;
  color: var(--color-muted-2); pointer-events: none;
}
.field--error .field__suffix { color: var(--color-accent); }
.form__note { font-size: 13px; color: var(--color-muted); margin-top: var(--space-4); }
.form__two { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }

/* =========================================================
   页脚 Footer（编辑式 / 暗底）
   ========================================================= */
.footer { position: relative; background: rgba(9,9,10,0.76); color: var(--color-ink); padding: var(--space-9) 0 var(--space-6); border-top: 1px solid var(--color-line); }
.footer::before { content: ""; position: absolute; top: 0; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, rgba(255,87,34,0.45), transparent); }
.footer a { color: var(--color-muted); text-decoration: none; transition: color var(--transition-fast); }
.footer a:hover { color: var(--color-accent); }
.footer__main { display: grid; grid-template-columns: 1.3fr 2fr; gap: var(--space-8); }
.footer__word { font-family: var(--font-display); font-weight: 700; font-size: clamp(48px, 7vw, 88px); line-height: 0.9; letter-spacing: -0.02em; color: var(--color-ink); margin-bottom: var(--space-4); }
.footer__tag { color: var(--color-muted); font-size: 15px; line-height: 1.7; margin: 0 0 var(--space-3); }
.footer__en { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--color-muted-2); margin: 0; }
.footer__cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.footer__col h4 { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--color-accent); margin: 0 0 var(--space-4); font-weight: 500; }
.footer__col ul { list-style: none; margin: 0; padding: 0; }
.footer__col li { margin-bottom: var(--space-3); font-size: 14px; color: var(--color-muted); display: flex; flex-wrap: wrap; gap: 6px; align-items: baseline; }
.footer__col li .k { color: var(--color-muted-2); min-width: 64px; }
.footer__col li span { color: var(--color-muted-2); font-family: var(--font-en); font-size: 12px; letter-spacing: 0.04em; }
.footer__divider { height: 1px; background: var(--color-line); margin: var(--space-8) 0 var(--space-5); }
.footer__bottom { font-size: 13px; color: var(--color-muted); display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--space-3); align-items: center; }
.footer__icp { color: var(--color-muted-2); }
.footer__bottom .footer__en { font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.16em; text-transform: uppercase; }

/* =========================================================
   资质网格 + Lightbox
   ========================================================= */
.certs { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-5); }
/* 方框卡片 + object-fit:contain：四张图为 2 竖(≈0.73) + 2 横(≈1.41)，
   用 1:1 方框配 contain 留白最均衡（约 25%），任意比例都完整显示、不裁切；
   留白由卡片底色填充，四张并排且彼此留出间隔 */
.cert { position: relative; aspect-ratio: 1 / 1; overflow: hidden; cursor: zoom-in; background: var(--color-paper-dim); border: 1px solid var(--color-line); border-radius: var(--radius-md); }
.cert:hover img { transform: scale(1.05); }
.cert img { width: 100%; height: 100%; object-fit: contain; display: block; transition: transform var(--transition); }
.cert__cap { position: absolute; left: 0; right: 0; bottom: 0; padding: var(--space-3) var(--space-4); font-size: 13px; color: #fff; text-align: center; background: linear-gradient(to top, rgba(0,0,0,0.72), transparent); opacity: 0; transition: opacity var(--transition-fast); pointer-events: none; }
.cert:hover .cert__cap { opacity: 1; }

/* 合作伙伴墙 */
.partner-wall { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: var(--space-3); }
.partner-wall__item {
  display: flex; align-items: center; justify-content: center;
  aspect-ratio: 4 / 3; padding: var(--space-3);
  background: var(--color-paper); border: 1px solid var(--color-line); border-radius: var(--radius-lg);
  text-decoration: none; overflow: hidden;
  transition: transform var(--transition), border-color var(--transition), background var(--transition);
}
.partner-wall__item img {
  width: 100%; height: 100%; object-fit: contain;
  filter: grayscale(1) opacity(.72);
  transition: filter var(--transition);
}
.partner-wall__name { font-size: 15px; font-weight: 600; color: var(--color-muted); text-align: center; line-height: 1.5; transition: color var(--transition); }
a.partner-wall__item { cursor: pointer; }
a.partner-wall__item:hover, a.partner-wall__item:focus-visible { transform: translateY(-4px); border-color: var(--color-line-strong); }
a.partner-wall__item:hover img, a.partner-wall__item:focus-visible img { filter: grayscale(0) opacity(1); }
a.partner-wall__item:hover .partner-wall__name, a.partner-wall__item:focus-visible .partner-wall__name { color: var(--color-ink); }

.lightbox { position: fixed; inset: 0; z-index: 200; display: none; align-items: center; justify-content: center; background: rgba(0,0,0,0.92); padding: var(--space-6); }
.lightbox.open { display: flex; }
.lightbox img { max-width: 90vw; max-height: 85vh; border-radius: var(--radius-sm); box-shadow: var(--shadow-2); }
.lightbox__close { position: absolute; top: var(--space-5); right: var(--space-5); color: var(--color-ink); font-size: 32px; cursor: pointer; line-height: 1; background: none; border: none; }
.lightbox__close:hover { color: var(--color-accent); }

/* =========================================================
   案例详情 Modal
   ========================================================= */
.modal { position: fixed; inset: 0; z-index: 200; display: none; align-items: flex-start; justify-content: center; background: rgba(0,0,0,0.85); padding: var(--space-8) var(--space-4); overflow-y: auto; }
.modal.open { display: flex; }
.modal__panel { background: var(--color-paper); border-radius: var(--radius-lg); max-width: 880px; width: 100%; margin: auto; box-shadow: var(--shadow-2); animation: modalIn var(--transition-slow); position: relative; overflow: hidden; }
@keyframes modalIn { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }
.modal__cover { width: 100%; aspect-ratio: 16/9; object-fit: cover; background: linear-gradient(135deg, #202024, #0d0d0f); display: block; }
.modal__body { padding: var(--space-7); }
.modal__title { font-size: var(--fs-h2); font-weight: var(--fw-h2); margin: 0 0 var(--space-4); }
.modal__meta { display: flex; flex-wrap: wrap; gap: var(--space-3); margin: var(--space-4) 0; }
.modal__gallery { display: flex; gap: var(--space-3); overflow-x: auto; margin: var(--space-4) 0; padding-bottom: var(--space-2); }
.modal__gallery img, .modal__gallery .cover-ph { width: 200px; flex: 0 0 200px; border-radius: var(--radius-md); }
.modal__desc { font-size: 16px; line-height: 1.85; color: var(--color-ink); }
.modal__cta { margin-top: var(--space-6); }
.modal__close { position: absolute; top: var(--space-4); right: var(--space-4); color: var(--color-ink); font-size: 30px; cursor: pointer; background: rgba(0,0,0,0.4); border: none; width: 44px; height: 44px; border-radius: 50%; line-height: 1; z-index: 3; }
.modal__close:hover { color: var(--color-accent); }

/* =========================================================
   时间轴 Timeline（里程碑 / 流程）
   ========================================================= */
.timeline { position: relative; max-width: 760px; margin: 0 auto; padding-left: var(--space-6); }
.timeline::before { content: ""; position: absolute; left: 5px; top: 6px; bottom: 6px; width: 2px; background: var(--color-line); }
.timeline__item { position: relative; padding-bottom: var(--space-7); }
.timeline__item:last-child { padding-bottom: 0; }
.timeline__dot { position: absolute; left: calc(-1 * var(--space-6) - 4px); top: 4px; width: 12px; height: 12px; border-radius: 50%; background: var(--color-paper); border: 2px solid var(--color-line-strong); }
.timeline__item.is-key .timeline__dot { background: var(--color-accent); border-color: var(--color-accent); box-shadow: 0 0 0 4px rgba(255,87,34,0.2); }
.timeline__year { font-family: var(--font-mono); font-size: 20px; font-weight: 700; color: var(--color-ink); }
.timeline__item.is-key .timeline__year { color: var(--color-accent); }
.timeline__text { font-size: 15px; color: var(--color-muted); margin-top: var(--space-2); line-height: 1.7; }

/* 流程步骤 */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--space-4); counter-reset: step; }
/* 卡片化：与 04「一站式娱乐场馆服务」.integration 用同一套盒型（底色/描边/圆角/内距/悬停），
   仅编号样式保留为圆形徽标，以区分「流程阶段」身份 */
.step {
  position: relative; text-align: center;
  background: var(--color-paper);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.step::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  display: flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; margin: 0 auto var(--space-3);
  border-radius: 50%;
  background: var(--color-bg-2); color: var(--color-accent);
  border: 1px solid var(--color-line-strong);
  font-weight: 700; font-family: var(--font-mono); font-size: 13px;
}
.step.is-active::before { background: var(--color-accent); color: var(--color-on-accent); border-color: var(--color-accent); box-shadow: 0 0 18px rgba(255,87,34,0.45); }
.step:hover { transform: translateY(-8px); box-shadow: var(--shadow-2), 0 0 0 1px rgba(255,87,34,0.4), inset 0 2px 0 0 var(--color-accent); border-color: var(--color-line-strong); }
.step__title { font-size: var(--fs-h4); font-weight: 600; line-height: 1.4; color: var(--color-ink); margin: 0 0 var(--space-3); }
.step__desc { font-size: 14px; line-height: 1.75; color: var(--color-muted); margin: 0; }

/* CTA 标语单行不换行（窄屏自适应缩小） */
.section__title--nowrap { white-space: nowrap; }
@media (max-width: 600px) {
  .section__title--nowrap { font-size: clamp(16px, 5vw, 26px); }
}

/* =========================================================
   滚动进入视口 · 跳入动画（reveal）
   目标元素初始 opacity:0 / translateY(28px)，进入视口后由 JS 加 .is-in 落位。
   只动 opacity + transform（不用 scale），避免文字在跳转中变形。
   ========================================================= */
.reveal {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity .8s cubic-bezier(.22,.61,.36,1), transform .8s cubic-bezier(.22,.61,.36,1);
  will-change: opacity, transform;
}
.reveal.is-in { opacity: 1; transform: none; }
/* 同组元素错落延迟：0.08s 步进，封顶 .56s（仅延迟 transform/opacity，不延迟 display/visibility） */
.reveal[data-reveal-delay="1"] { transition-delay: .08s; }
.reveal[data-reveal-delay="2"] { transition-delay: .16s; }
.reveal[data-reveal-delay="3"] { transition-delay: .24s; }
.reveal[data-reveal-delay="4"] { transition-delay: .32s; }
.reveal[data-reveal-delay="5"] { transition-delay: .40s; }
.reveal[data-reveal-delay="6"] { transition-delay: .48s; }
.reveal[data-reveal-delay="7"] { transition-delay: .56s; }
.reveal[data-reveal-delay="8"] { transition-delay: .56s; }

/* 悬停反馈加强：全站卡片统一抬升幅度 + 橙红辉光描边（与 .step 保持一致）。
   注意：本规则必须放在 .reveal.is-in 之后 —— 两者特异度相同（0,2,0），
   若写在前面，会被 .reveal.is-in 的 transform:none 覆盖，导致抬升失效。 */
.biz:hover, .integration:hover, .card--case:hover, .card--service:hover, .step:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-2), 0 0 0 1px rgba(255,87,34,0.4), inset 0 2px 0 0 var(--color-accent);
  border-color: var(--color-line-strong);
}

/* =========================================================
   联系页
   ========================================================= */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: var(--space-8); align-items: start; }
.contact-card { background: var(--color-paper); border: 1px solid var(--color-line); border-radius: var(--radius-lg); padding: var(--space-6); margin-bottom: var(--space-4); }
.contact-card h3 { font-size: var(--fs-h4); margin: 0 0 var(--space-4); }
.contact-list { list-style: none; margin: 0; padding: 0; }
.contact-list li { display: flex; gap: var(--space-3); padding: var(--space-3) 0; border-bottom: 1px solid var(--color-line); font-size: 15px; flex-wrap: wrap; }
.contact-list li:last-child { border-bottom: none; }
.contact-list .k { color: var(--color-muted); min-width: 72px; }
.contact-list .v { color: var(--color-ink); font-weight: 500; }
.contact-list a.v { text-decoration: none; }
.contact-list a.v:hover { color: var(--color-accent); }
.copy-btn { background: none; border: none; color: var(--color-accent); font-size: 13px; cursor: pointer; margin-left: var(--space-2); padding: 0; }

.map-frame { width: 100%; aspect-ratio: 16/9; border-radius: var(--radius-lg); border: 1px solid var(--color-line); background: var(--color-paper-dim); display: flex; align-items: center; justify-content: center; color: var(--color-muted); font-size: 14px; overflow: hidden; }
.map-iframe { width: 100%; height: 100%; border: 0; display: block; }
.map-actions { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-3); margin-top: var(--space-3); font-size: 13px; }
.map-open { color: var(--color-accent); text-decoration: none; font-weight: 600; white-space: nowrap; }
.map-open:hover { text-decoration: underline; }
.map-addr { color: var(--color-muted); }

/* =========================================================
   加载 / 空态 / 错误
   ========================================================= */
.state { text-align: center; padding: var(--space-9) var(--space-4); color: var(--color-muted); }
.state__icon { font-size: 40px; margin-bottom: var(--space-4); }
.state__title { font-size: var(--fs-h3); color: var(--color-ink); margin: 0 0 var(--space-3); }
.state__text { margin: 0 0 var(--space-5); }
.skeleton { background: linear-gradient(90deg, #1a1a1d 25%, #222 37%, #1a1a1d 63%); background-size: 400% 100%; animation: sk 1.4s ease infinite; border-radius: var(--radius-md); }
@keyframes sk { 0% { background-position: 100% 0; } 100% { background-position: -100% 0; } }
.skeleton-card { border: 1px solid var(--color-line); border-radius: var(--radius-lg); overflow: hidden; }
.skeleton-card .sk-cover { aspect-ratio: 4/3; }
.skeleton-card .sk-line { height: 16px; margin: var(--space-4) var(--space-5); }

/* =========================================================
   Toast
   ========================================================= */
.toast { position: fixed; left: 50%; bottom: var(--space-7); transform: translateX(-50%) translateY(20px); z-index: 250; background: var(--color-paper); color: var(--color-ink); border: 1px solid var(--color-line); padding: var(--space-4) var(--space-6); border-radius: var(--radius-pill); box-shadow: var(--shadow-2); opacity: 0; transition: opacity var(--transition), transform var(--transition); pointer-events: none; max-width: 90vw; }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast--ok { border-left: 3px solid var(--color-accent); }

/* =========================================================
   响应式断点
   ========================================================= */
@media (max-width: 1023px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-5 { grid-template-columns: repeat(3, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .certs { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); row-gap: var(--space-7); }
  .contact-grid { grid-template-columns: 1fr; gap: var(--space-6); }
  .footer__main { grid-template-columns: 1fr; gap: var(--space-6); }
  .partner-wall { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
}
@media (max-width: 767px) {
  .nav__menu { display: none; }
  .nav__burger { display: inline-flex; }
  /* 字标在小屏等比收缩，避免与汉堡按钮抢位 */
  .nav__logo__cn { font-size: 19px; letter-spacing: 0.1em; margin-right: -0.1em; }
  .nav__logo__sub { font-size: 8px; letter-spacing: 0.24em; margin-right: -0.24em; padding-left: 17px; }
  .nav__logo__sub::before { width: 11px; }
  /* 小屏：TANGYU 字距较宽，字号取保守值保证 6 字母不溢出 */
  .hero__brand { font-size: clamp(36px, 13vw, 120px); }
  .grid-3, .grid-2, .grid-4, .grid-5 { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .certs { grid-template-columns: repeat(2, 1fr); }
  .footer__cols { grid-template-columns: 1fr; gap: var(--space-5); }
  .footer__top, .hero__cta { flex-direction: column; }
  .btn { width: 100%; }
  .form__two { grid-template-columns: 1fr; }
  .section { padding: var(--space-8) 0; }
  .hero { padding: var(--nav-h) 0 var(--space-7); }
  .steps { grid-template-columns: 1fr; }
  .hero__scroll { display: none; }
  .partner-wall { grid-template-columns: repeat(3, 1fr); gap: var(--space-3); }
  .partner-wall__item { aspect-ratio: 4 / 3; padding: var(--space-3); }
  .integration { padding: var(--space-5); }
}
@media (max-width: 480px) {
  .grid-5 { grid-template-columns: 1fr; }
}

/* 减少动效 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .skeleton { animation: none; }
  /* 跳入动画在减少动效下直接显示，绝不能永久停在 opacity:0 */
  .reveal { opacity: 1 !important; transform: none !important; }
}

/* =========================================================
   案例详情 · 图集轮播（gal-*）
   ========================================================= */
.modal__gallerywrap { margin: var(--space-5) 0 0; }
.modal__gallerywrap:empty { display: none; }
.gal-stage { position: relative; border-radius: var(--radius-md); overflow: hidden; background: #0a0a0b; }
.gal-stage img { display: block; width: 100%; max-height: 62vh; object-fit: contain; background: #0a0a0b; }
.gal-nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 44px; height: 44px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.3); background: rgba(10,10,11,0.55);
  color: #fff; font-size: 24px; line-height: 1; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}
.gal-nav:hover { background: rgba(255,87,34,0.85); border-color: transparent; }
.gal-prev { left: var(--space-3); }
.gal-next { right: var(--space-3); }
.gal-count {
  position: absolute; right: var(--space-3); bottom: var(--space-3);
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.08em;
  color: #fff; background: rgba(10,10,11,0.55);
  padding: 4px 12px; border-radius: var(--radius-pill);
}
.gal-thumbs { display: flex; gap: var(--space-2); margin-top: var(--space-3); overflow-x: auto; padding-bottom: var(--space-1); }
.gal-thumb {
  width: 76px; height: 56px; object-fit: cover; flex: 0 0 auto;
  border-radius: var(--radius-sm); border: 2px solid transparent;
  opacity: 0.55; cursor: pointer; transition: opacity var(--transition-fast), border-color var(--transition-fast);
}
.gal-thumb:hover { opacity: 0.85; }
.gal-thumb.active { border-color: var(--color-accent); opacity: 1; }



/* =========================================================
   品牌自定义光标：「唐宇」橘红渐变字标（仅前台）
   - 图片 assets/cursor-ty-{32,64}.png，热点 (3,3) 对准字左上角
   - 交互元素保留系统 pointer / text 光标，不牺牲可用性
   - 不支持自定义光标的环境自动回退 auto
   ========================================================= */
body.ty-front { cursor: url('../assets/cursor-ty-32.png') 3 3, url('../assets/cursor-ty-64.png') 3 3, auto; }
body.ty-front a,
body.ty-front button,
body.ty-front [role='button'],
body.ty-front .copy-btn,
body.ty-front .gal-nav,
body.ty-front .gal-thumb,
body.ty-front label[for] { cursor: pointer; }
body.ty-front input,
body.ty-front textarea,
body.ty-front select { cursor: auto; }