/* ============================================================
   湖南德业建设有限公司 · 企业官网
   工业简约商务风 / 深蓝 + 深灰 / 响应式
   ============================================================ */

:root {
  /* 品牌色取自企业 Logo：深棕 + 金橙 + 砖红 */
  --navy: #3D2B22;          /* 深棕（品牌主色） */
  --navy-deep: #241811;     /* 深棕暗黑 */
  --navy-soft: #5C4033;     /* Logo 棕 */
  --ink: #2A2A2A;
  --paper: #F4F2EF;         /* 暖纸灰 */
  --paper-warm: #FBFAF8;
  --accent: #E8A020;        /* Logo 金橙 */
  --accent-bright: #F2B13C; /* 亮金 */
  --brand-red: #C0392B;     /* Logo 砖红 */
  --line: rgba(61, 43, 34, 0.14);
  --line-light: rgba(255, 255, 255, 0.14);
  --muted: rgba(42, 42, 42, 0.62);
  --muted-light: rgba(255, 255, 255, 0.62);
  --font-cn: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-smooth: cubic-bezier(0.33, 0.51, 0.56, 0.98);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-cn);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

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

/* ---------- 布局容器 ---------- */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}
@media (min-width: 768px) { .container { padding: 0 40px; } }

.section { padding: 96px 0; }
@media (min-width: 768px) { .section { padding: 140px 0; } }
.section--tight { padding: 72px 0; }
.section--dark { background: var(--navy); color: #fff; }
.section--ink { background: var(--ink); color: #fff; }
.section--white { background: var(--paper-warm); }

/* ---------- 眉题（eyebrow） ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
}
.eyebrow::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  flex: none;
}
.section--dark .eyebrow, .section--ink .eyebrow { color: var(--accent-bright); }
.section--dark .eyebrow::before, .section--ink .eyebrow::before { background: var(--accent-bright); }

/* ---------- 标题体系 ---------- */
.display {
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-size: clamp(2.4rem, 6.5vw, 4.6rem);
}
.title {
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.02em;
  font-size: clamp(1.7rem, 3.6vw, 2.6rem);
}
.subtitle {
  margin-top: 18px;
  max-width: 640px;
  color: var(--muted);
  font-size: 17px;
}
.section--dark .subtitle, .section--ink .subtitle { color: var(--muted-light); }

.section-head { margin-bottom: 56px; }
.section-head--split {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
}

/* ---------- 文字滑动按钮 ---------- */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 15px 32px;
  border-radius: 1000px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  border: 1px solid transparent;
  overflow: hidden;
  transition: background 0.35s var(--ease-smooth), border-color 0.35s, color 0.35s, transform 0.35s var(--ease-smooth);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn .btn-roll {
  position: relative;
  display: block;
  overflow: hidden;
  height: 1.5em;
}
.btn .btn-roll span {
  display: block;
  transition: transform 0.4s var(--ease-smooth);
}
.btn:hover .btn-roll span { transform: translateY(-100%); }
.btn .btn-roll span::after {
  content: attr(data-text);
  display: block;
  position: absolute;
  top: 100%; left: 0;
  width: 100%;
}
.btn svg { width: 16px; height: 16px; flex: none; transition: transform 0.4s var(--ease-smooth); }
.btn:hover svg { transform: translateX(4px); }

.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--navy); }
.btn--ghost { background: transparent; color: #fff; border-color: rgba(255, 255, 255, 0.4); }
.btn--ghost:hover { border-color: #fff; }
.btn--outline { background: transparent; color: var(--navy); border-color: var(--line); }
.btn--outline:hover { border-color: var(--navy); }
.btn--light { background: #fff; color: var(--navy); }
.btn--light:hover { background: var(--accent); color: #fff; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: transform 0.35s var(--ease-smooth), background 0.35s, box-shadow 0.35s;
}
.site-header.is-hidden { transform: translateY(-110%); }
.site-header .header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.site-header.is-solid {
  background: rgba(5, 31, 56, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.08);
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  color: #fff;
}
.brand-mark {
  width: 40px; height: 40px;
  flex: none;
  display: grid;
  place-items: center;
  background: #fff;
  border-radius: 6px;
  padding: 3px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.18);
}
.brand-mark img { width: 100%; height: 100%; object-fit: contain; }
.brand-name { font-size: 18px; font-weight: 800; letter-spacing: 0.02em; line-height: 1.2; }
.brand-sub {
  display: block;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.26em;
  color: var(--muted-light);
  text-transform: uppercase;
}

.main-nav { display: none; align-items: center; gap: 6px; }
@media (min-width: 992px) { .main-nav { display: flex; } }
.main-nav a {
  position: relative;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.78);
  transition: color 0.3s;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 16px; right: 16px; bottom: 4px;
  height: 2px;
  background: var(--accent-bright);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease-smooth);
}
.main-nav a:hover, .main-nav a.is-active { color: #fff; }
.main-nav a:hover::after, .main-nav a.is-active::after { transform: scaleX(1); }
.header-cta { display: none; }
@media (min-width: 992px) { .header-cta { display: inline-flex; padding: 10px 24px; font-size: 14px; } }

/* 移动端菜单 */
.menu-toggle {
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 120;
}
@media (min-width: 992px) { .menu-toggle { display: none; } }
.menu-toggle span {
  position: relative;
  width: 24px; height: 2px;
  background: #fff;
  transition: background 0.3s;
}
.menu-toggle span::before, .menu-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 24px; height: 2px;
  background: #fff;
  transition: transform 0.35s var(--ease-smooth), top 0.35s;
}
.menu-toggle span::before { top: -7px; }
.menu-toggle span::after { top: 7px; }
.menu-toggle.is-open span { background: transparent; }
.menu-toggle.is-open span::before { top: 0; transform: rotate(45deg); }
.menu-toggle.is-open span::after { top: 0; transform: rotate(-45deg); }

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 110;
  background: var(--navy-deep);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 40px 32px;
  transform: translateY(-100%);
  transition: transform 0.5s var(--ease-smooth);
}
.mobile-menu.is-open { transform: translateY(0); }
.mobile-menu a {
  padding: 14px 0;
  font-size: 26px;
  font-weight: 700;
  color: #fff;
  border-bottom: 1px solid var(--line-light);
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.4s, transform 0.4s var(--ease-smooth);
}
.mobile-menu.is-open a { opacity: 1; transform: translateY(0); }
.mobile-menu a:nth-child(1) { transition-delay: 0.10s; }
.mobile-menu a:nth-child(2) { transition-delay: 0.16s; }
.mobile-menu a:nth-child(3) { transition-delay: 0.22s; }
.mobile-menu a:nth-child(4) { transition-delay: 0.28s; }
.mobile-menu a:nth-child(5) { transition-delay: 0.34s; }
.mobile-menu a:nth-child(6) { transition-delay: 0.40s; }
.mobile-menu .menu-tip { margin-top: 28px; font-size: 13px; color: var(--muted-light); border: none; }

/* ---------- 首屏 Hero ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  color: #fff;
  overflow: hidden;
  background: var(--navy-deep);
}
.hero-bg {
  position: absolute;
  inset: 0;
}
.hero-bg img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center;
  transform: scale(1.06);
  animation: hero-zoom 8s var(--ease-out) forwards;
}
@keyframes hero-zoom { to { transform: scale(1); } }
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5,31,56,0.55) 0%, rgba(5,31,56,0.18) 42%, rgba(5,31,56,0.88) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  width: 100%;
  padding-bottom: 88px;
  padding-top: 160px;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  margin-bottom: 28px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 1000px;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.85);
  background: rgba(5, 31, 56, 0.3);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.hero-tag i {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent-bright);
  animation: blink 2.4s ease-in-out infinite;
}
@keyframes blink { 0%, 100% { opacity: 0.25; } 50% { opacity: 1; } }
.hero .display { max-width: 15em; }
.hero-lead {
  margin-top: 24px;
  max-width: 560px;
  font-size: 17px;
  color: rgba(255, 255, 255, 0.78);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 40px; }
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 32px 56px;
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}
.hero-meta .meta-num {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
}
.hero-meta .meta-num em { font-style: normal; color: var(--accent-bright); }
.hero-meta .meta-label { margin-top: 6px; font-size: 13px; color: rgba(255, 255, 255, 0.6); letter-spacing: 0.06em; }

/* 页面内页横幅 */
.page-hero {
  position: relative;
  padding: 180px 0 88px;
  background: var(--navy-deep);
  color: #fff;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(115deg, rgba(5, 31, 56, 0.96) 30%, rgba(8, 45, 79, 0.72) 100%);
  z-index: 1;
}
.page-hero .hero-img {
  position: absolute;
  inset: 0;
}
.page-hero .hero-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.5;
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero .breadcrumb {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--muted-light);
  margin-bottom: 18px;
}
.page-hero .breadcrumb a:hover { color: #fff; }

/* ---------- 关键词跑马灯 ---------- */
.marquee-band {
  background: var(--navy);
  color: rgba(255, 255, 255, 0.9);
  padding: 22px 0;
  overflow: hidden;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.marquee-track {
  display: flex;
  width: max-content;
  animation: marquee 40s linear infinite;
}
.marquee-band:hover .marquee-track { animation-play-state: paused; }
.marquee-track span {
  display: inline-flex;
  align-items: center;
  gap: 28px;
  padding-right: 28px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.12em;
  white-space: nowrap;
}
.marquee-track span::after {
  content: "";
  width: 8px; height: 8px;
  background: var(--accent-bright);
  transform: rotate(45deg);
  flex: none;
}
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }
.marquee-band {
  -webkit-mask-image: linear-gradient(to right, transparent, #000 6%, #000 94%, transparent);
  mask-image: linear-gradient(to right, transparent, #000 6%, #000 94%, transparent);
}

/* ---------- Bento 业务网格 ---------- */
.bento {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 20px;
}
.bento-item {
  position: relative;
  grid-column: span 12;
  border-radius: 6px;
  overflow: hidden;
  background: var(--paper-warm);
  border: 1px solid var(--line);
  padding: 36px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 300px;
  transition: transform 0.45s var(--ease-smooth), box-shadow 0.45s, border-color 0.45s;
}
.bento-item:hover {
  transform: translateY(-6px);
  border-color: rgba(8, 45, 79, 0.3);
  box-shadow: 0 24px 48px -24px rgba(8, 45, 79, 0.35);
}
.bento-item--dark {
  background: var(--navy);
  color: #fff;
  border-color: transparent;
}
.bento-item--img { padding: 0; border: none; min-height: 340px; }
.bento-item--img img {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--ease-smooth);
}
.bento-item--img:hover img { transform: scale(1.05); }
.bento-item--img::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5,31,56,0) 30%, rgba(5,31,56,0.85) 100%);
}
.bento-item--img .bento-body { position: relative; z-index: 2; padding: 36px; color: #fff; }
@media (min-width: 768px) {
  .bento-item--w7 { grid-column: span 7; }
  .bento-item--w5 { grid-column: span 5; }
  .bento-item--w4 { grid-column: span 4; }
  .bento-item--w8 { grid-column: span 8; }
  .bento-item--w6 { grid-column: span 6; }
}
.bento-icon {
  width: 56px; height: 56px;
  margin-bottom: auto;
  color: var(--accent);
}
.bento-item--dark .bento-icon, .bento-item--img .bento-icon { color: var(--accent-bright); }
.bento-icon svg { width: 100%; height: 100%; }
.bento-body h3 { font-size: 21px; font-weight: 700; margin: 24px 0 10px; letter-spacing: -0.01em; }
.bento-item--img .bento-body h3 { margin-top: 0; }
.bento-body p { font-size: 14.5px; color: var(--muted); line-height: 1.7; }
.bento-item--dark .bento-body p, .bento-item--img .bento-body p { color: rgba(255, 255, 255, 0.7); }
.bento-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
}
.bento-item--dark .bento-link, .bento-item--img .bento-link { color: var(--accent-bright); }
.bento-link svg { width: 15px; height: 15px; transition: transform 0.35s var(--ease-smooth); }
.bento-item:hover .bento-link svg { transform: translateX(5px); }

/* ---------- 数字统计带 ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px 24px;
}
@media (min-width: 768px) { .stats-grid { grid-template-columns: repeat(4, 1fr); } }
.stat-cell { border-left: 1px solid rgba(255, 255, 255, 0.16); padding-left: 24px; }
.stat-cell .num {
  font-size: clamp(2.2rem, 4.5vw, 3.4rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.02em;
}
.stat-cell .num small { font-size: 0.45em; font-weight: 700; color: var(--accent-bright); margin-left: 2px; }
.stat-cell .label { margin-top: 12px; font-size: 14px; color: var(--muted-light); }

/* ---------- 流程步骤 ---------- */
.process-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}
@media (min-width: 992px) { .process-grid { grid-template-columns: repeat(4, 1fr); gap: 0; } }
.process-step { position: relative; padding: 0 0; }
@media (min-width: 992px) {
  .process-step { padding: 0 32px; border-left: 1px solid var(--line); }
  .process-step:first-child { border-left: none; padding-left: 0; }
}
.step-num {
  width: 46px; height: 46px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 22px;
}
.process-step h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.process-step p { font-size: 14.5px; color: var(--muted); }

/* ---------- 案例卡片 ---------- */
.case-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}
@media (min-width: 768px) { .case-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1100px) { .case-grid--3 { grid-template-columns: repeat(3, 1fr); } }
.case-card {
  position: relative;
  border-radius: 6px;
  overflow: hidden;
  background: var(--navy-deep);
  aspect-ratio: 3 / 2.2;
  cursor: pointer;
}
.case-card img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.9s var(--ease-smooth), opacity 0.5s;
}
.case-card:hover img { transform: scale(1.06); opacity: 0.75; }
.case-card .case-info {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 28px;
  color: #fff;
  background: linear-gradient(180deg, rgba(5,31,56,0) 0%, rgba(5,31,56,0.9) 78%);
}
.case-tag {
  display: inline-block;
  padding: 5px 12px;
  margin-bottom: 12px;
  border-radius: 1000px;
  background: rgba(232, 160, 32, 0.2);
  border: 1px solid rgba(242, 177, 60, 0.5);
  color: #FFE0A6;
  font-size: 12px;
  letter-spacing: 0.08em;
}
.case-info h3 { font-size: 19px; font-weight: 700; line-height: 1.4; }
.case-info .case-desc {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
  transition: max-height 0.5s var(--ease-smooth), opacity 0.4s, margin 0.4s;
}
.case-card:hover .case-desc { max-height: 120px; opacity: 1; margin-top: 10px; }

/* 案例筛选 */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 44px;
}
.filter-btn {
  padding: 9px 22px;
  border-radius: 1000px;
  border: 1px solid var(--line);
  background: transparent;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.3s;
}
.filter-btn:hover { border-color: var(--navy); color: var(--navy); }
.filter-btn.is-active { background: var(--navy); border-color: var(--navy); color: #fff; }
.case-grid .case-card.is-hide { display: none; }

/* ---------- 关于页 ---------- */
.about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}
@media (min-width: 992px) { .about-split { grid-template-columns: 1.05fr 1fr; gap: 72px; } }
.about-img { border-radius: 6px; overflow: hidden; }
.about-img img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; }
.about-text p { margin-bottom: 18px; color: var(--muted); font-size: 16px; }
.about-text p strong { color: var(--ink); font-weight: 700; }

.value-list { display: grid; gap: 0; border-top: 1px solid var(--line); }
.value-item {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 20px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}
.value-item .v-num { font-size: 26px; font-weight: 800; color: var(--accent); letter-spacing: -0.02em; }
.value-item h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.value-item p { font-size: 14.5px; color: var(--muted); }

/* ---------- 服务详情（业务页） ---------- */
.service-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding: 64px 0;
  border-bottom: 1px solid var(--line);
  align-items: center;
}
.service-row:last-child { border-bottom: none; }
@media (min-width: 992px) {
  .service-row { grid-template-columns: 1fr 1fr; gap: 72px; padding: 80px 0; }
  .service-row.is-reverse .service-media { order: 2; }
}
.service-media { border-radius: 6px; overflow: hidden; position: relative; }
.service-media img { width: 100%; aspect-ratio: 3 / 2; object-fit: cover; transition: transform 0.9s var(--ease-smooth); }
.service-media:hover img { transform: scale(1.04); }
.service-index {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 14px;
}
.service-body h2 { font-size: clamp(1.5rem, 2.6vw, 2rem); font-weight: 800; letter-spacing: -0.01em; margin-bottom: 16px; }
.service-body > p { color: var(--muted); margin-bottom: 24px; }
.service-points { display: grid; gap: 12px; margin-bottom: 28px; }
.service-points li {
  position: relative;
  padding-left: 26px;
  font-size: 15px;
}
.service-points li::before {
  content: "";
  position: absolute;
  left: 0; top: 7px;
  width: 13px; height: 13px;
  background: var(--accent);
  /* 三角对勾形，呼应 Logo 中的三角元素 */
  clip-path: polygon(0 46%, 38% 100%, 100% 8%, 82% 0, 34% 72%, 14% 32%);
}

/* ---------- 新闻 ---------- */
.news-list { border-top: 1px solid var(--line); }
.news-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px 32px;
  padding: 34px 8px;
  border-bottom: 1px solid var(--line);
  transition: background 0.3s, padding 0.3s var(--ease-smooth);
  cursor: pointer;
}
@media (min-width: 768px) { .news-item { grid-template-columns: 140px 1fr 40px; align-items: center; } }
.news-item:hover { background: var(--paper-warm); padding-left: 20px; padding-right: 20px; }
.news-date { font-size: 14px; font-weight: 600; color: var(--accent); letter-spacing: 0.04em; }
.news-date small { display: block; font-size: 12px; color: var(--muted); font-weight: 400; margin-top: 2px; }
.news-item h3 { font-size: 18px; font-weight: 700; line-height: 1.5; transition: color 0.3s; }
.news-item:hover h3 { color: var(--accent); }
.news-item p { margin-top: 8px; font-size: 14.5px; color: var(--muted); }
.news-arrow { justify-self: end; color: var(--muted); transition: transform 0.35s var(--ease-smooth), color 0.3s; }
.news-item:hover .news-arrow { transform: translateX(6px); color: var(--accent); }
.news-arrow svg { width: 22px; height: 22px; }

/* 新闻正文展开 */
.news-detail {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.55s var(--ease-smooth);
}
.news-item.is-open .news-detail { max-height: 640px; }
.news-detail-inner {
  grid-column: 1 / -1;
  padding: 20px 0 6px;
  font-size: 15px;
  color: var(--muted);
  line-height: 1.9;
}
.news-detail-inner p { margin-bottom: 14px; }
.news-item.is-open .news-arrow { transform: rotate(90deg); color: var(--accent); }

/* ---------- 联系与留言 ---------- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 56px;
}
@media (min-width: 992px) { .contact-grid { grid-template-columns: 5fr 7fr; gap: 80px; } }
.contact-info-item {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 18px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}
.contact-info-item:first-child { padding-top: 0; }
.ci-icon {
  width: 48px; height: 48px;
  display: grid;
  place-items: center;
  border-radius: 4px;
  background: var(--navy);
  color: #fff;
}
.ci-icon svg { width: 22px; height: 22px; }
.contact-info-item h3 { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.contact-info-item p { font-size: 15px; color: var(--muted); }

.form-card {
  background: var(--paper-warm);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 40px;
}
@media (min-width: 768px) { .form-card { padding: 52px; } }
.form-row { display: grid; grid-template-columns: 1fr; gap: 20px; }
@media (min-width: 768px) { .form-row--2 { grid-template-columns: 1fr 1fr; } }
.form-field { margin-bottom: 20px; }
.form-field label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
}
.form-field label i { color: #C0392B; font-style: normal; }
.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: #fff;
  font-family: inherit;
  font-size: 15px;
  color: var(--ink);
  transition: border-color 0.3s, box-shadow 0.3s;
}
.form-field textarea { min-height: 130px; resize: vertical; }
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.14);
}
.form-field.is-error input,
.form-field.is-error textarea,
.form-field.is-error select { border-color: #C0392B; }
.form-field .err-msg { display: none; margin-top: 6px; font-size: 13px; color: #C0392B; }
.form-field.is-error .err-msg { display: block; }
.form-note { font-size: 13px; color: var(--muted); margin-top: 4px; }
.form-status {
  display: none;
  margin-top: 20px;
  padding: 14px 18px;
  border-radius: 4px;
  font-size: 14.5px;
}
.form-status.is-ok { display: block; background: rgba(0, 102, 204, 0.1); color: var(--navy); border: 1px solid rgba(0, 102, 204, 0.3); }
.form-status.is-fail { display: block; background: rgba(192, 57, 43, 0.08); color: #C0392B; border: 1px solid rgba(192, 57, 43, 0.3); }

/* ---------- CTA 横幅 ---------- */
.cta-band { position: relative; overflow: hidden; }
.cta-band .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.cta-band .title { max-width: 18em; }
.cta-deco {
  position: absolute;
  right: -80px; top: -80px;
  width: 340px; height: 340px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
}
.cta-deco::after {
  content: "";
  position: absolute;
  inset: 60px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--navy-deep);
  color: #fff;
  padding: 88px 0 0;
  overflow: hidden;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  padding-bottom: 64px;
}
@media (min-width: 768px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 32px; } }
.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 22px;
}
.footer-col ul { display: grid; gap: 12px; }
.footer-col a { font-size: 15px; color: rgba(255, 255, 255, 0.78); transition: color 0.3s, padding 0.3s; }
.footer-col a:hover { color: var(--accent-bright); padding-left: 6px; }
.footer-desc { margin-top: 18px; font-size: 14.5px; color: var(--muted-light); max-width: 320px; }
.footer-contact li { font-size: 15px; color: rgba(255, 255, 255, 0.78); line-height: 1.7; }
.footer-wordmark {
  font-size: clamp(3rem, 11vw, 9rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1;
  text-align: center;
  color: rgba(255, 255, 255, 0.06);
  white-space: nowrap;
  user-select: none;
  padding: 12px 0 0;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 22px 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  justify-content: space-between;
}

/* ---------- 滚动入场动画 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}
[data-reveal].is-in { opacity: 1; transform: translateY(0); }
[data-reveal="2"] { transition-delay: 0.12s; }
[data-reveal="3"] { transition-delay: 0.24s; }
[data-reveal="4"] { transition-delay: 0.36s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 回到顶部 ---------- */
.to-top {
  position: fixed;
  right: 24px; bottom: 24px;
  z-index: 90;
  width: 48px; height: 48px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--navy);
  color: #fff;
  border: none;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 0.35s, transform 0.35s var(--ease-smooth), background 0.3s;
  box-shadow: 0 10px 24px -10px rgba(5, 31, 56, 0.5);
}
.to-top.is-show { opacity: 1; pointer-events: auto; transform: translateY(0); }
.to-top:hover { background: var(--accent); }
.to-top svg { width: 20px; height: 20px; }

/* ============================================================
   品质升级包：预加载 / 进度条 / 逐行入场 / 双色调 / 装饰字
   ============================================================ */

/* ---------- 定制滚动条 ---------- */
::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--paper); }
::-webkit-scrollbar-thumb { background: var(--navy); border-radius: 5px; border: 2px solid var(--paper); }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }
html { scrollbar-width: thin; scrollbar-color: var(--navy) var(--paper); }

/* ---------- 品牌预加载 ---------- */
.preloader {
  position: fixed;
  inset: 0;
  z-index: 999;
  background: var(--navy-deep);
  display: grid;
  place-items: center;
  transition: opacity 0.7s var(--ease-smooth), visibility 0.7s;
}
.preloader.is-done { opacity: 0; visibility: hidden; pointer-events: none; }
.pre-inner { text-align: center; color: #fff; }
.pre-mark {
  width: 88px; height: 88px;
  margin: 0 auto 22px;
  display: grid; place-items: center;
  background: #fff;
  border-radius: 14px;
  padding: 8px;
  box-shadow: 0 18px 44px -12px rgba(232, 160, 32, 0.45);
  animation: pre-pulse 1.6s ease-in-out infinite;
}
@keyframes pre-pulse { 0%, 100% { transform: scale(1); } 50% { transform: scale(1.08); } }
.pre-name {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: 0.32em;
  text-indent: 0.32em;
  background: linear-gradient(180deg, #FFFFFF 30%, rgba(255, 255, 255, 0.35) 130%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.pre-sub { margin-top: 8px; font-size: 11px; letter-spacing: 0.4em; text-indent: 0.4em; color: rgba(255, 255, 255, 0.4); }
.pre-bar {
  width: 180px; height: 2px;
  margin: 26px auto 0;
  background: rgba(255, 255, 255, 0.15);
  overflow: hidden;
}
.pre-bar i {
  display: block; height: 100%; width: 40%;
  background: var(--accent-bright);
  animation: pre-slide 1.1s var(--ease-smooth) infinite;
}
@keyframes pre-slide { from { transform: translateX(-100%); } to { transform: translateX(350%); } }

/* ---------- 顶部阅读进度条 ---------- */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--brand-red), var(--accent));
  z-index: 210;
  transition: width 0.1s linear;
}

/* ---------- 首屏标题逐行入场 ---------- */
.hero .line { display: block; overflow: hidden; }
.hero .line-inner {
  display: block;
  transform: translateY(112%);
  animation: line-up 1.1s var(--ease-out) forwards;
}
.hero .line:nth-child(2) .line-inner { animation-delay: 0.18s; }
@keyframes line-up { to { transform: translateY(0); } }
.hero-tag, .hero-lead, .hero-actions, .hero-meta {
  opacity: 0;
  animation: fade-up 0.9s var(--ease-out) forwards;
}
.hero-tag { animation-delay: 0.1s; }
.hero-lead { animation-delay: 0.5s; }
.hero-actions { animation-delay: 0.68s; }
.hero-meta { animation-delay: 0.86s; }
@keyframes fade-up { from { opacity: 0; transform: translateY(22px); } to { opacity: 1; transform: translateY(0); } }

/* ---------- 巨型描边装饰字 ---------- */
.section-head { position: relative; }
.head-ghost {
  position: absolute;
  top: -0.55em;
  right: 0;
  font-size: clamp(4rem, 11vw, 9rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0.02em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(8, 45, 79, 0.1);
  pointer-events: none;
  user-select: none;
  z-index: 0;
}
.section--dark .head-ghost, .section--ink .head-ghost { -webkit-text-stroke-color: rgba(255, 255, 255, 0.1); }
.section-head > *:not(.head-ghost) { position: relative; z-index: 1; }

.page-hero { position: relative; }
.page-hero .ghost-word {
  position: absolute;
  right: 2%;
  bottom: -0.18em;
  z-index: 1;
  font-size: clamp(4.5rem, 13vw, 11rem);
  font-weight: 900;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.14);
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
}
@media (max-width: 768px) { .head-ghost { display: none; } .page-hero .ghost-word { font-size: 4rem; } }

/* ---------- 蓝图点阵背景 ---------- */
.dot-grid { position: relative; }
.dot-grid::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(8, 45, 79, 0.12) 1px, transparent 1px);
  background-size: 26px 26px;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, transparent, #000 15%, #000 85%, transparent);
  mask-image: linear-gradient(180deg, transparent, #000 15%, #000 85%, transparent);
}
.section--dark.dot-grid::before { background-image: radial-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px); }
.dot-grid > .container { position: relative; z-index: 1; }

/* ---------- 图片双色调蓝（hover 还原真彩） ---------- */
.bento-item--img::before,
.case-card::before,
.service-media::before,
.about-img::before,
.page-hero .hero-img::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: var(--navy);
  mix-blend-mode: color;
  opacity: 0.5;
  transition: opacity 0.7s var(--ease-smooth);
  pointer-events: none;
}
.bento-item--img:hover::before,
.case-card:hover::before,
.service-media:hover::before,
.about-img:hover::before { opacity: 0.08; }
.bento-item--img img, .case-card img, .service-media img, .about-img img {
  filter: grayscale(0.45) contrast(1.04);
}
.bento-item--img:hover img, .case-card:hover img,
.service-media:hover img, .about-img:hover img { filter: grayscale(0); }
.about-img { position: relative; }
.case-card .case-info { z-index: 2; }
.bento-item--img::after { z-index: 1; }
.page-hero .hero-img::before { opacity: 0.35; z-index: 0; }

/* ---------- 案例卡片：圆形箭头按钮 ---------- */
.case-card .case-arrow {
  position: absolute;
  top: 22px; right: 22px;
  z-index: 3;
  width: 46px; height: 46px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  color: #fff;
  opacity: 0;
  transform: translateY(-8px) rotate(-45deg);
  transition: opacity 0.4s, transform 0.45s var(--ease-smooth), background 0.3s;
}
.case-card:hover .case-arrow { opacity: 1; transform: translateY(0) rotate(0); }
.case-card .case-arrow svg { width: 18px; height: 18px; }

/* ---------- 数据带单元格 hover ---------- */
.stat-cell { transition: padding 0.4s var(--ease-smooth), border-color 0.4s; }
.stat-cell:hover { border-left-color: var(--accent-bright); padding-left: 32px; }

/* ---------- 为什么选择德业（首页新增） ---------- */
.why-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}
@media (min-width: 992px) { .why-grid { grid-template-columns: 5fr 7fr; gap: 80px; } }
.why-left { position: relative; }
@media (min-width: 992px) { .why-left .sticky-box { position: sticky; top: 110px; } }
.why-list { border-top: 1px solid var(--line-light); }
.why-item {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 24px;
  padding: 34px 8px;
  border-bottom: 1px solid var(--line-light);
  align-items: start;
  transition: padding 0.4s var(--ease-smooth), background 0.4s;
}
.why-item:hover { padding-left: 22px; background: rgba(255, 255, 255, 0.03); }
.why-item .w-index {
  font-size: 34px;
  font-weight: 900;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(46, 140, 255, 0.65);
  transition: color 0.4s;
}
.why-item:hover .w-index { color: var(--accent-bright); -webkit-text-stroke-color: transparent; }
.why-item h3 { font-size: 19px; font-weight: 700; margin-bottom: 8px; }
.why-item p { font-size: 14.5px; color: var(--muted-light); }

/* ---------- 眉题线条延展 ---------- */
.eyebrow { position: relative; }
.eyebrow::after {
  content: "";
  width: 42px; height: 1px;
  background: currentColor;
  opacity: 0.5;
}

/* ---------- 页脚巨字渐显 ---------- */
.footer-wordmark {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.09) 0%, rgba(255, 255, 255, 0.015) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ===== 企业展厅实拍 ===== */
.showroom-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.showroom-grid--4 { grid-template-columns: repeat(4, 1fr); }
.showroom-item { position: relative; overflow: hidden; border-radius: 6px; background: var(--navy-deep); aspect-ratio: 4/3; margin: 0; }
.showroom-item img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform 0.9s cubic-bezier(0.2, 0.6, 0.2, 1); }
.showroom-item::after { content: ""; position: absolute; inset: 0; background: linear-gradient(to top, rgba(20, 12, 8, 0.68), transparent 46%); opacity: 0; transition: opacity 0.5s; }
.showroom-item figcaption { position: absolute; z-index: 2; left: 0; right: 0; bottom: 0; padding: 20px 18px 15px; font-size: 13px; letter-spacing: 0.06em; color: #fff; opacity: 0; transform: translateY(10px); transition: 0.45s; }
.showroom-item:hover::after { opacity: 1; }
.showroom-item:hover figcaption { opacity: 1; transform: none; }
.showroom-item:hover img { transform: scale(1.07); }
.showroom-item--wide { grid-column: span 2; }
.contact-photo { margin-top: 36px; border-radius: 6px; overflow: hidden; }
.contact-photo img { width: 100%; aspect-ratio: 4/3; object-fit: cover; display: block; }
@media (max-width: 980px) {
  .showroom-grid, .showroom-grid--4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .showroom-grid, .showroom-grid--4 { grid-template-columns: 1fr; }
  .showroom-item--wide { grid-column: span 1; }
}