/* ==========================================================================
   托管邦建站 tuoguanbang.net.cn - 全站主样式表
   风格：雪地靴温暖风（米杏 + 浅棕 + 奶白，金属铜线条贯穿）
   纵向时间轴递进布局，纯原生 CSS3，无任何框架依赖
   ========================================================================== */

/* ---------- 设计变量 ---------- */
:root {
  /* 奶白系（雪地靴羊毛内衬、温暖底色） */
  --cream-50:  #FFFDF8;
  --cream-100: #FAF6F0;
  --cream-200: #F5EFE6;
  --cream-300: #EDE5D8;

  /* 米杏系（雪地靴鞋面、温暖主色） */
  --apricot-50:  #F8F2E8;
  --apricot-100: #F5EDE0;
  --apricot-200: #EDE0CC;
  --apricot-300: #E0D0B8;
  --apricot-400: #D4C0A0;
  --apricot-500: #C8B088;

  /* 浅棕系（雪地靴鞋底、皮革、金属铜） */
  --tan-300: #C4A57B;
  --tan-400: #B8956A;
  --tan-500: #A68255;
  --tan-600: #8E6E45;
  --tan-700: #755A38;
  --tan-800: #5C462C;
  --tan-900: #423220;

  /* 金属铜线条（贯穿全页装饰线） */
  --copper-light: #D4B896;
  --copper:       #B8956A;
  --copper-dark:  #9A7B52;
  --copper-glow:  rgba(184, 149, 106, 0.25);

  /* 文字色 */
  --text-900: #3D3226;
  --text-700: #5C4D3A;
  --text-500: #7A6A55;
  --text-400: #9A8B76;
  --text-300: #B8AA96;

  /* 功能 */
  --radius-sm: 3px;
  --radius:    8px;
  --radius-lg: 16px;
  --shadow-sm: 0 2px 10px rgba(66, 50, 32, 0.06);
  --shadow:    0 8px 28px rgba(66, 50, 32, 0.10);
  --shadow-lg: 0 18px 44px rgba(66, 50, 32, 0.16);
  --container: 1240px;
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---------- 重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB",
               -apple-system, BlinkMacSystemFont, "Segoe UI",
               "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-700);
  background: var(--cream-100);
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; border: 0; }
a { color: inherit; text-decoration: none; transition: color .3s var(--ease); }
a:hover { color: var(--tan-600); }
ul, ol { list-style: none; }
button { font: inherit; cursor: pointer; border: 0; background: transparent; color: inherit; }
input, textarea, select { font: inherit; color: inherit; }

h1, h2, h3, h4, h5 {
  color: var(--text-900);
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.01em;
}
h1 { font-size: clamp(2rem, 4vw, 2.8rem); }
h2 { font-size: clamp(1.5rem, 2.6vw, 2.1rem); }
h3 { font-size: clamp(1.15rem, 1.6vw, 1.35rem); }
h4 { font-size: 1.08rem; }
p  { color: var(--text-500); }

/* ---------- 容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 32px;
}
.container-narrow { max-width: 860px; }
.container-wide   { max-width: 1400px; }
section { position: relative; }

/* ==========================================================================
   雪地靴温暖风装饰系统 —— 金属铜线条贯穿
   ========================================================================== */

/* 温暖纹理背景 */
.warm-bg {
  background:
    radial-gradient(ellipse at 15% 20%, rgba(196, 165, 123, 0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 85% 80%, rgba(184, 149, 106, 0.06) 0%, transparent 50%),
    var(--cream-100);
}
.cream-bg { background: var(--cream-50); }
.apricot-bg { background: var(--apricot-100); }
.tan-bg { background: var(--tan-800); color: var(--cream-100); }
.tan-bg h2, .tan-bg h3, .tan-bg h4 { color: var(--cream-50); }

/* 金属铜竖线 —— 时间轴主轴（贯穿全页） */
.copper-axis {
  position: absolute;
  top: 0; bottom: 0;
  left: 50%;
  width: 2px;
  background: linear-gradient(180deg,
    transparent 0%,
    var(--copper-light) 8%,
    var(--copper) 50%,
    var(--copper-light) 92%,
    transparent 100%);
  transform: translateX(-50%);
  z-index: 1;
  pointer-events: none;
}
.copper-axis::before,
.copper-axis::after {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--copper);
  box-shadow: 0 0 0 4px var(--cream-100), 0 0 12px var(--copper-glow);
}
.copper-axis::before { top: 0; }
.copper-axis::after { bottom: 0; }

/* 金属铜水平线装饰 */
.copper-rule {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--copper), transparent);
  margin: 0 auto;
}
.copper-rule.dashed {
  height: 0;
  border-top: 1px dashed var(--copper-light);
  background: none;
}

/* 铜扣装饰（时间轴节点） */
.copper-dot {
  width: 16px; height: 16px;
  border-radius: 50%;
  background: var(--cream-50);
  border: 3px solid var(--copper);
  box-shadow: 0 0 0 4px var(--cream-100), 0 2px 8px var(--copper-glow);
  flex-shrink: 0;
}

/* 缝线装饰（雪地靴缝线元素） */
.stitch-border {
  position: relative;
  border: 1px solid var(--copper-light);
}
.stitch-border::before {
  content: "";
  position: absolute;
  inset: 4px;
  border: 1px dashed var(--copper-light);
  border-radius: inherit;
  pointer-events: none;
  opacity: 0.5;
}

/* 金属铭牌标签 */
.metal-plate {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: linear-gradient(135deg, var(--tan-400), var(--tan-600));
  color: var(--cream-50);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  border-radius: 2px;
  box-shadow: 0 2px 8px rgba(142, 110, 69, 0.3), inset 0 1px 0 rgba(255,255,255,0.2);
  position: relative;
}
.metal-plate::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--cream-100);
  box-shadow: 0 0 4px rgba(255,255,255,0.5);
}

/* ==========================================================================
   顶部导航（固定，滚动变色，移动端汉堡菜单）
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(250, 246, 240, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: background .4s var(--ease), border-color .4s var(--ease), box-shadow .4s var(--ease);
}
.site-header.scrolled {
  background: rgba(250, 246, 240, 0.97);
  border-bottom-color: var(--apricot-200);
  box-shadow: var(--shadow-sm);
}
.header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  font-weight: 600; font-size: 1.15rem; color: var(--text-900);
  letter-spacing: 0.03em;
}
.brand img { width: 40px; height: 40px; border-radius: 6px; object-fit: cover; }
.brand-text small {
  display: block; font-size: 0.6rem; font-weight: 400;
  color: var(--text-400); letter-spacing: 0.22em;
  text-transform: uppercase; margin-top: 2px;
}

.main-nav { display: flex; align-items: center; gap: 2px; }
.main-nav > li { position: relative; }
.main-nav > li > a {
  display: block;
  padding: 10px 14px;
  font-size: 0.9rem;
  color: var(--text-700);
  border-radius: 3px;
  transition: all .3s var(--ease);
  position: relative;
}
.main-nav > li > a::after {
  content: "";
  position: absolute;
  bottom: 4px; left: 14px; right: 14px;
  height: 2px;
  background: linear-gradient(90deg, var(--copper-light), var(--copper));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s var(--ease);
  border-radius: 1px;
}
.main-nav > li > a:hover,
.main-nav > li.active > a {
  color: var(--text-900);
}
.main-nav > li > a:hover::after,
.main-nav > li.active > a::after {
  transform: scaleX(1);
}
/* 下拉菜单 */
.dropdown-menu {
  position: absolute;
  top: calc(100% + 6px); left: 0;
  min-width: 240px;
  background: var(--cream-50);
  border: 1px solid var(--apricot-200);
  border-radius: 6px;
  box-shadow: var(--shadow);
  padding: 8px;
  opacity: 0; visibility: hidden;
  transform: translateY(10px);
  transition: all .35s var(--ease);
  max-height: 72vh;
  overflow-y: auto;
}
.dropdown-menu::before {
  content: "";
  position: absolute;
  top: -6px; left: 20px;
  width: 10px; height: 10px;
  background: var(--cream-50);
  border-left: 1px solid var(--apricot-200);
  border-top: 1px solid var(--apricot-200);
  transform: rotate(45deg);
}
.main-nav li:hover > .dropdown-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown-menu li a {
  display: block;
  padding: 9px 14px;
  border-radius: 3px;
  font-size: 0.86rem;
  color: var(--text-700);
  transition: all .25s var(--ease);
  border-left: 2px solid transparent;
}
.dropdown-menu li a:hover {
  background: var(--apricot-100);
  color: var(--tan-700);
  border-left-color: var(--copper);
  padding-left: 18px;
}

.nav-cta {
  margin-left: 12px;
  padding: 10px 24px;
  background: linear-gradient(135deg, var(--tan-600), var(--tan-800));
  color: var(--cream-50);
  border-radius: 3px;
  font-size: 0.88rem;
  font-weight: 500;
  transition: all .3s var(--ease);
  position: relative;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(142, 110, 69, 0.3);
}
.nav-cta::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: var(--copper-light);
}
.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(142, 110, 69, 0.35);
  color: var(--cream-50);
}

/* 汉堡按钮 */
.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  border-radius: 4px;
  background: var(--apricot-100);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--tan-700);
  border-radius: 1px;
  transition: all .3s var(--ease);
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动抽屉 */
.mobile-drawer {
  position: fixed;
  top: 76px; right: 0;
  width: 82%; max-width: 340px;
  height: calc(100vh - 76px);
  background: var(--cream-50);
  border-left: 1px solid var(--apricot-200);
  box-shadow: var(--shadow-lg);
  padding: 24px;
  transform: translateX(100%);
  transition: transform .4s var(--ease-out);
  overflow-y: auto;
  z-index: 999;
}
.mobile-drawer.open { transform: translateX(0); }
.mobile-drawer > li > a {
  display: block;
  padding: 14px 16px;
  border-bottom: 1px solid var(--apricot-200);
  color: var(--text-700);
  font-weight: 500;
  font-size: 0.95rem;
}
.mobile-drawer > li > a:hover { color: var(--tan-700); background: var(--apricot-100); }
.mobile-sub { padding-left: 16px; }
.mobile-sub li a {
  display: block;
  padding: 10px 14px;
  font-size: 0.86rem;
  color: var(--text-500);
  border-bottom: 1px dotted var(--apricot-300);
}
.overlay {
  position: fixed; inset: 0;
  background: rgba(66, 50, 32, 0.4);
  opacity: 0; visibility: hidden;
  transition: all .35s var(--ease);
  z-index: 998;
}
.overlay.show { opacity: 1; visibility: visible; }

/* ==========================================================================
   按钮
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 30px;
  border-radius: 3px;
  font-size: 0.92rem;
  font-weight: 500;
  transition: all .35s var(--ease);
  border: 1px solid transparent;
  cursor: pointer;
  letter-spacing: 0.02em;
}
.btn-primary {
  background: linear-gradient(135deg, var(--tan-600), var(--tan-800));
  color: var(--cream-50);
  position: relative;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(142, 110, 69, 0.25);
}
.btn-primary::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: var(--copper-light);
  transition: width .35s var(--ease);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgba(142, 110, 69, 0.35);
  color: var(--cream-50);
}
.btn-primary:hover::before { width: 6px; }

.btn-outline {
  border-color: var(--copper);
  color: var(--tan-700);
  background: transparent;
}
.btn-outline:hover {
  background: var(--tan-700);
  color: var(--cream-50);
  border-color: var(--tan-700);
  transform: translateY(-2px);
}

.btn-cream {
  background: var(--cream-50);
  color: var(--tan-800);
  border: 1px solid var(--apricot-300);
}
.btn-cream:hover {
  background: var(--apricot-100);
  transform: translateY(-2px);
}

.btn-lg { padding: 15px 38px; font-size: 1rem; }
.btn-sm { padding: 8px 20px; font-size: 0.84rem; }

.txt-link {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--tan-600); font-weight: 500; font-size: 0.9rem;
  border-bottom: 1px solid var(--copper-light);
  padding-bottom: 2px;
  transition: all .3s var(--ease);
}
.txt-link::after { content: "→"; transition: transform .3s; }
.txt-link:hover { color: var(--text-900); border-bottom-color: var(--text-900); }
.txt-link:hover::after { transform: translateX(4px); }

/* ==========================================================================
   板块标题
   ========================================================================== */
.section { padding: 90px 0; }
.section-tight { padding: 56px 0; }

.section-head { max-width: 700px; margin-bottom: 48px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 5px 16px;
  background: var(--apricot-100);
  color: var(--tan-700);
  border-radius: 2px;
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 18px;
  position: relative;
}
.eyebrow::before {
  content: "";
  width: 16px; height: 1px;
  background: var(--copper);
}
.eyebrow.tan { background: linear-gradient(135deg, var(--tan-500), var(--tan-700)); color: var(--cream-50); }
.eyebrow.tan::before { background: var(--copper-light); }
.eyebrow.dark { background: rgba(255, 253, 248, 0.1); color: var(--apricot-200); }
.eyebrow.dark::before { background: var(--copper-light); }
.section-head p { font-size: 1.02rem; color: var(--text-500); margin-top: 14px; }
.section-head.center p { margin-left: auto; margin-right: auto; }

/* 章节编号装饰 */
.chapter-num {
  font-size: 3.5rem;
  font-weight: 300;
  color: var(--apricot-300);
  line-height: 1;
  letter-spacing: -0.05em;
}

/* ==========================================================================
   英雄区（首页横幅）—— 温暖橱窗式 + 铜线条
   ========================================================================== */
.hero-home {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 70px;
  background:
    radial-gradient(ellipse at 10% 90%, rgba(196, 165, 123, 0.1) 0%, transparent 45%),
    radial-gradient(ellipse at 90% 10%, rgba(184, 149, 106, 0.08) 0%, transparent 40%),
    var(--cream-100);
  position: relative;
  overflow: hidden;
}
/* 底部铜线条装饰带 */
.hero-home::before {
  content: "";
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 6px;
  background: repeating-linear-gradient(
    90deg,
    var(--tan-600) 0px, var(--tan-600) 30px,
    var(--copper) 30px, var(--copper) 60px,
    var(--tan-400) 60px, var(--tan-400) 90px,
    var(--tan-700) 90px, var(--tan-700) 120px
  );
  opacity: 0.7;
}
/* 左侧铜轴线 */
.hero-home::after {
  content: "";
  position: absolute;
  top: 0; bottom: 0;
  left: 8%;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--copper-light), transparent);
  opacity: 0.4;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 2;
}
.hero-text .eyebrow { margin-bottom: 24px; }
.hero-title {
  margin-bottom: 22px;
  font-weight: 600;
  letter-spacing: 0.01em;
}
.hero-title .accent {
  color: var(--tan-600);
  position: relative;
  display: inline-block;
}
.hero-title .accent::after {
  content: "";
  position: absolute;
  bottom: 4px; left: 0; right: 0;
  height: 10px;
  background: var(--apricot-200);
  z-index: -1;
  opacity: 0.7;
  border-radius: 2px;
}
.hero-desc {
  font-size: 1.05rem;
  margin-bottom: 36px;
  max-width: 520px;
  line-height: 1.9;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats {
  display: flex;
  gap: 0;
  flex-wrap: wrap;
  border-top: 1px solid var(--apricot-300);
  padding-top: 24px;
}
.hero-stat {
  padding: 0 28px;
  border-right: 1px solid var(--apricot-300);
}
.hero-stat:first-child { padding-left: 0; }
.hero-stat:last-child { border-right: 0; }
.hero-stat .num {
  font-size: 1.9rem;
  font-weight: 600;
  color: var(--text-900);
  line-height: 1;
}
.hero-stat .lbl {
  font-size: 0.82rem;
  color: var(--text-400);
  margin-top: 6px;
  letter-spacing: 0.05em;
}

/* 英雄区图片：层叠陈列式 */
.hero-collage {
  position: relative;
  height: 520px;
}
.hero-collage .collage-item {
  position: absolute;
  border-radius: 6px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform .5s var(--ease);
  border: 3px solid var(--cream-50);
}
.hero-collage .collage-item img {
  width: 100%; height: 100%; object-fit: cover;
}
.hero-collage .collage-item:hover { transform: translateY(-6px) scale(1.02); }
.hero-collage .c-1 {
  top: 0; left: 0;
  width: 58%; height: 54%;
  z-index: 2;
}
.hero-collage .c-2 {
  top: 6%; right: 0;
  width: 50%; height: 42%;
  z-index: 3;
}
.hero-collage .c-3 {
  bottom: 0; left: 8%;
  width: 60%; height: 48%;
  z-index: 1;
}
.hero-collage .collage-plate {
  position: absolute;
  bottom: 4%; right: 2%;
  background: var(--cream-50);
  padding: 16px 22px;
  border-radius: 4px;
  box-shadow: var(--shadow);
  border-left: 3px solid var(--copper);
  z-index: 4;
}
.hero-collage .collage-plate strong {
  display: block;
  color: var(--text-900);
  font-size: 1rem;
  font-weight: 600;
}
.hero-collage .collage-plate small {
  color: var(--text-400);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
}

/* ==========================================================================
   核心优势：铜轴时间线式（左右交替）
   ========================================================================== */
.timeline-section {
  position: relative;
  padding: 90px 0;
}
.timeline-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  position: relative;
}
.timeline-grid::before {
  content: "";
  position: absolute;
  top: 0; bottom: 0;
  left: 50%;
  width: 2px;
  background: linear-gradient(180deg, transparent, var(--copper-light), var(--copper), var(--copper-light), transparent);
  transform: translateX(-50%);
}
.tl-item {
  padding: 32px 48px;
  position: relative;
}
.tl-item:nth-child(odd) { text-align: right; padding-right: 60px; }
.tl-item:nth-child(even) { padding-left: 60px; }
.tl-item::before {
  content: "";
  position: absolute;
  top: 40px;
  width: 14px; height: 14px;
  border-radius: 50%;
  background: var(--cream-50);
  border: 3px solid var(--copper);
  box-shadow: 0 0 0 4px var(--cream-100), 0 2px 8px var(--copper-glow);
  z-index: 2;
}
.tl-item:nth-child(odd)::before { right: -7px; }
.tl-item:nth-child(even)::before { left: -7px; }
.tl-item .tl-icon {
  width: 48px; height: 48px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--tan-500), var(--tan-700));
  color: var(--cream-50);
  display: grid; place-items: center;
  margin-bottom: 16px;
  box-shadow: 0 3px 10px rgba(142, 110, 69, 0.3);
}
.tl-item:nth-child(odd) .tl-icon { margin-left: auto; }
.tl-item h3 { margin-bottom: 10px; }
.tl-item p { font-size: 0.94rem; line-height: 1.85; }

/* ==========================================================================
   服务卡片：铜扣排列式
   ========================================================================== */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  background: var(--cream-50);
  border-radius: 6px;
  padding: 34px 28px;
  position: relative;
  transition: all .4s var(--ease);
  border: 1px solid var(--apricot-200);
  overflow: hidden;
}
.service-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 4px; height: 100%;
  background: linear-gradient(180deg, var(--copper-light), var(--copper), var(--tan-600));
  transition: width .4s var(--ease);
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: var(--copper-light);
}
.service-card:hover::before { width: 6px; }
.service-card .sc-num {
  font-size: 2.2rem;
  font-weight: 300;
  color: var(--apricot-300);
  line-height: 1;
  margin-bottom: 14px;
}
.service-card h4 {
  margin-bottom: 10px;
  font-size: 1.06rem;
  color: var(--text-900);
}
.service-card p { font-size: 0.88rem; line-height: 1.8; }
.service-card .sc-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 0.84rem;
  color: var(--tan-600);
  font-weight: 500;
}
.service-card .sc-link::after { content: "→"; transition: transform .3s; }
.service-card:hover .sc-link::after { transform: translateX(4px); }

/* ==========================================================================
   流程时间线：铜轴步进式
   ========================================================================== */
.process-line {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  position: relative;
  padding: 20px 0;
}
.process-line::before {
  content: "";
  position: absolute;
  top: 48px; left: 8%; right: 8%;
  height: 2px;
  background: repeating-linear-gradient(
    90deg,
    var(--copper) 0px, var(--copper) 8px,
    transparent 8px, transparent 16px
  );
}
.process-step {
  text-align: center;
  padding: 0 14px;
  position: relative;
  z-index: 1;
}
.process-step .step-dot {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--cream-50);
  border: 2px solid var(--copper);
  color: var(--tan-600);
  font-size: 0.95rem;
  font-weight: 600;
  display: grid; place-items: center;
  margin: 0 auto 20px;
  transition: all .3s var(--ease);
  box-shadow: 0 2px 8px var(--copper-glow);
}
.process-step:hover .step-dot {
  background: linear-gradient(135deg, var(--tan-500), var(--tan-700));
  color: var(--cream-50);
  border-color: var(--tan-700);
  transform: scale(1.1);
}
.process-step h4 { margin-bottom: 8px; font-size: 1rem; }
.process-step p { font-size: 0.84rem; line-height: 1.7; }

/* ==========================================================================
   案例卡片
   ========================================================================== */
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.case-card {
  background: var(--cream-50);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all .4s var(--ease);
  border: 1px solid var(--apricot-200);
  display: flex;
  flex-direction: column;
}
.case-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow);
}
.case-img {
  position: relative;
  overflow: hidden;
  height: 220px;
}
.case-img img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .6s var(--ease);
}
.case-card:hover .case-img img { transform: scale(1.06); }
.case-tag {
  position: absolute;
  top: 14px; left: 14px;
  padding: 4px 12px;
  background: rgba(250, 246, 240, 0.92);
  color: var(--tan-700);
  border-radius: 2px;
  font-size: 0.76rem;
  font-weight: 500;
  backdrop-filter: blur(6px);
  letter-spacing: 0.05em;
  border-left: 2px solid var(--copper);
}
.case-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.case-title { font-size: 1.1rem; margin-bottom: 10px; color: var(--text-900); }
.case-desc { font-size: 0.9rem; margin-bottom: 16px; flex: 1; }
.case-meta {
  display: flex; justify-content: space-between;
  font-size: 0.8rem; color: var(--text-400);
  padding-top: 12px;
  border-top: 1px dashed var(--apricot-300);
}

/* ==========================================================================
   资讯卡片
   ========================================================================== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
}
.news-card {
  background: var(--cream-50);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all .4s var(--ease);
  border: 1px solid var(--apricot-200);
  display: flex;
  flex-direction: column;
}
.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}
.news-img { height: 180px; overflow: hidden; }
.news-img img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .6s var(--ease);
}
.news-card:hover .news-img img { transform: scale(1.05); }
.news-body { padding: 20px 22px; flex: 1; display: flex; flex-direction: column; }
.news-date {
  font-size: 0.8rem;
  color: var(--tan-600);
  font-weight: 500;
  margin-bottom: 8px;
  letter-spacing: 0.05em;
}
.news-title {
  font-size: 1.04rem;
  margin-bottom: 8px;
  line-height: 1.5;
  color: var(--text-900);
}
.news-excerpt { font-size: 0.88rem; flex: 1; margin-bottom: 12px; }
.news-foot {
  display: flex; justify-content: space-between; align-items: center;
  font-size: 0.76rem; color: var(--text-400);
  padding-top: 10px;
  border-top: 1px dashed var(--apricot-300);
}

/* 资讯列表页布局 */
.news-list-layout {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

/* ==========================================================================
   数据统计带
   ========================================================================== */
.stats-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  background: linear-gradient(135deg, var(--tan-800), var(--tan-900));
  border-radius: 6px;
  padding: 40px 28px;
  position: relative;
  overflow: hidden;
}
.stats-band::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: repeating-linear-gradient(
    90deg,
    var(--copper) 0px, var(--copper) 30px,
    var(--tan-400) 30px, var(--tan-400) 60px
  );
}
.stats-item {
  text-align: center;
  padding: 0 20px;
  border-right: 1px solid rgba(255, 253, 248, 0.1);
}
.stats-item:last-child { border-right: 0; }
.stats-num {
  font-size: 2.3rem;
  font-weight: 600;
  color: var(--cream-50);
  line-height: 1;
  margin-bottom: 8px;
}
.stats-lbl {
  font-size: 0.88rem;
  color: var(--apricot-300);
  letter-spacing: 0.08em;
}

/* ==========================================================================
   CTA 横幅
   ========================================================================== */
.cta-banner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 32px;
  align-items: center;
  background: linear-gradient(135deg, var(--tan-800), var(--tan-900));
  border-radius: 6px;
  padding: 48px 44px;
  color: var(--cream-100);
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 4px; height: 100%;
  background: linear-gradient(180deg, var(--copper-light), var(--copper));
}
.cta-banner::after {
  content: "";
  position: absolute;
  top: -40px; right: -40px;
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(196, 165, 123, 0.15) 0%, transparent 70%);
  border-radius: 50%;
}
.cta-banner h2 { color: var(--cream-50); margin-bottom: 10px; }
.cta-banner p { color: rgba(255, 253, 248, 0.7); }
.cta-banner .flex { justify-content: flex-end; }

/* ==========================================================================
   页脚
   ========================================================================== */
.site-footer {
  background: linear-gradient(180deg, var(--tan-900), #352818);
  color: var(--apricot-200);
  padding: 72px 0 0;
  position: relative;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: repeating-linear-gradient(
    90deg,
    var(--copper) 0px, var(--copper) 30px,
    var(--tan-400) 30px, var(--tan-400) 60px,
    var(--tan-600) 60px, var(--tan-600) 90px
  );
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr 1.3fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 253, 248, 0.08);
}
.footer-col h4 {
  color: var(--cream-100);
  font-size: 0.95rem;
  margin-bottom: 20px;
  letter-spacing: 0.08em;
  font-weight: 600;
  position: relative;
  padding-bottom: 10px;
}
.footer-col h4::after {
  content: "";
  position: absolute;
  bottom: 0; left: 0;
  width: 24px; height: 2px;
  background: linear-gradient(90deg, var(--copper-light), var(--copper));
}
.footer-col p {
  color: var(--text-400);
  font-size: 0.88rem;
  line-height: 1.9;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
  color: var(--apricot-200);
  font-size: 0.88rem;
  transition: all .3s var(--ease);
}
.footer-col ul li a:hover {
  color: var(--copper-light);
  padding-left: 5px;
}
.footer-contact li {
  display: flex; gap: 10px; align-items: flex-start;
  margin-bottom: 12px;
  font-size: 0.88rem;
  color: var(--apricot-200);
  line-height: 1.6;
}
.footer-contact .ic {
  color: var(--copper);
  flex-shrink: 0;
  margin-top: 3px;
}
.footer-bottom {
  padding: 24px 0;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 12px;
  font-size: 0.82rem; color: var(--text-400);
}
.footer-bottom a { color: var(--text-400); }
.footer-bottom a:hover { color: var(--copper-light); }
.footer-icp a { color: var(--apricot-300); }
.footer-social { display: flex; gap: 10px; margin-top: 18px; }
.footer-social a {
  width: 36px; height: 36px;
  border-radius: 4px;
  border: 1px solid rgba(255, 253, 248, 0.15);
  display: grid; place-items: center;
  color: var(--apricot-200);
  transition: all .3s var(--ease);
}
.footer-social a:hover {
  background: var(--copper);
  color: var(--cream-50);
  border-color: var(--copper);
}

/* ==========================================================================
   页面通用：面包屑、页头横幅
   ========================================================================== */
.page-hero {
  padding: 140px 0 64px;
  background:
    radial-gradient(circle at 15% 25%, rgba(196, 165, 123, 0.08) 0%, transparent 45%),
    radial-gradient(circle at 85% 75%, rgba(184, 149, 106, 0.06) 0%, transparent 45%),
    var(--cream-100);
  border-bottom: 1px solid var(--apricot-200);
  position: relative;
  overflow: hidden;
}
.page-hero::after {
  content: "";
  position: absolute;
  left: 50%; bottom: -1px;
  width: 80px; height: 3px;
  background: linear-gradient(90deg, var(--copper-light), var(--copper));
  transform: translateX(-50%);
}
.breadcrumb {
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
  font-size: 0.84rem; color: var(--text-400);
  margin-bottom: 18px;
}
.breadcrumb a:hover { color: var(--tan-600); }
.breadcrumb span.sep { color: var(--apricot-400); }
.page-hero h1 { margin-bottom: 14px; }
.page-hero p { font-size: 1.05rem; max-width: 640px; }

/* ==========================================================================
   表单
   ========================================================================== */
.form-row { margin-bottom: 20px; }
.form-label {
  display: block;
  font-size: 0.88rem;
  color: var(--text-700);
  margin-bottom: 8px;
  font-weight: 500;
}
.form-label .req { color: var(--tan-600); }
.form-control {
  width: 100%;
  padding: 12px 16px;
  background: var(--cream-50);
  border: 1px solid var(--apricot-300);
  border-radius: 3px;
  font-size: 0.94rem;
  transition: all .3s var(--ease);
  color: var(--text-700);
}
.form-control:focus {
  outline: none;
  border-color: var(--copper);
  box-shadow: 0 0 0 3px var(--copper-glow);
  background: #fff;
}
textarea.form-control { min-height: 130px; resize: vertical; }
.form-grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

/* ==========================================================================
   工具类
   ========================================================================== */
.text-center { text-align: center; }
.text-right  { text-align: right; }
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.mt-2 { margin-top: 16px; }
.mt-4 { margin-top: 32px; }
.mb-2 { margin-bottom: 16px; }
.mb-4 { margin-bottom: 32px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.flex   { display: flex; }
.flex-center { display: flex; align-items: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.gap-1 { gap: 8px; } .gap-2 { gap: 16px; } .gap-3 { gap: 24px; }
.tag {
  display: inline-block; padding: 3px 12px;
  background: var(--apricot-100); color: var(--tan-700);
  border-radius: 2px; font-size: 0.76rem; font-weight: 500;
}
.tag.tan { background: linear-gradient(135deg, var(--tan-500), var(--tan-700)); color: var(--cream-50); }

/* ==========================================================================
   滚动渐入动画
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: .1s; }
.reveal-delay-2 { transition-delay: .2s; }
.reveal-delay-3 { transition-delay: .3s; }
.reveal-delay-4 { transition-delay: .4s; }

/* 返回顶部 */
.back-to-top {
  position: fixed; right: 28px; bottom: 28px;
  width: 46px; height: 46px;
  border-radius: 4px;
  background: linear-gradient(135deg, var(--tan-600), var(--tan-800));
  color: var(--cream-50);
  display: grid; place-items: center;
  box-shadow: var(--shadow);
  opacity: 0; visibility: hidden;
  transition: all .3s;
  z-index: 900;
  border: 1px solid var(--copper);
}
.back-to-top::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: var(--copper-light);
}
.back-to-top.show { opacity: 1; visibility: visible; }
.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 18px rgba(142, 110, 69, 0.4);
}