/* ============================================================
   深圳市恒通科技有限公司官网 - 全站样式
   主题：深藏青 + 科技金 + 电光青（深色质感）
   ============================================================ */

/* ---------- 主题变量 ---------- */
:root {
  --color-bg: #0a1628;
  --color-bg-alt: #0d1c33;
  --color-card: #10233f;
  --color-line: rgba(232, 181, 77, 0.18);
  --color-gold: #e8b54d;
  --color-gold-soft: #f2cd7e;
  --color-cyan: #38e1c6;
  --color-text: #e8edf5;
  --color-text-dim: #93a1b8;
  --font-display: "Playfair Display", "Noto Serif SC", "Songti SC", "STSong", Georgia, serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --nav-height: 72px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- 基础重置 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

.container { max-width: 1160px; margin: 0 auto; padding: 0 32px; }

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-block;
  padding: 14px 40px;
  border-radius: 999px;
  font-size: 15px;
  letter-spacing: 2px;
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s var(--ease-out),
    background 0.35s, color 0.35s;
}
.btn-gold {
  background: linear-gradient(135deg, var(--color-gold), var(--color-gold-soft));
  color: #1a1206;
  font-weight: 600;
  box-shadow: 0 8px 28px rgba(232, 181, 77, 0.28);
}
.btn-gold:hover { transform: translateY(-3px); box-shadow: 0 14px 36px rgba(232, 181, 77, 0.4); }
.btn-outline {
  border: 1px solid rgba(232, 237, 245, 0.35);
  color: var(--color-text);
}
.btn-outline:hover {
  transform: translateY(-3px);
  border-color: var(--color-gold);
  color: var(--color-gold);
}

/* ============================================================
   导航栏
   ============================================================ */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--nav-height);
  transition: background 0.4s, box-shadow 0.4s, backdrop-filter 0.4s;
}
.nav.scrolled {
  background: rgba(10, 22, 40, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 rgba(232, 181, 77, 0.15);
}
.nav-inner {
  max-width: 1160px;
  margin: 0 auto;
  height: 100%;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo { display: flex; align-items: center; gap: 12px; }
.nav-logo-mark {
  position: relative;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  color: var(--color-gold);
  font-family: var(--font-display);
  font-size: 19px;
  line-height: 1;
}
.nav-logo-mark::before {
  content: "";
  position: absolute;
  inset: 3px;
  border: 1px solid var(--color-gold);
  border-radius: 7px;
  transform: rotate(45deg);
}
.nav-logo-text { display: flex; flex-direction: column; line-height: 1.25; }
.nav-logo-text strong { font-size: 17px; letter-spacing: 3px; }
.nav-logo-text small {
  font-size: 10px;
  letter-spacing: 2.5px;
  color: var(--color-text-dim);
  text-transform: uppercase;
}
/* 英文版导航：拼音品牌名首字母大写 */
.nav-logo-pinyin { text-transform: capitalize; }
.nav-links { display: flex; align-items: center; gap: 36px; }
.nav-links a {
  font-size: 14px;
  letter-spacing: 1.5px;
  color: var(--color-text-dim);
  position: relative;
  padding: 4px 0;
  transition: color 0.3s;
}
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--color-gold);
  transition: width 0.35s var(--ease-out);
}
.nav-links a:hover { color: var(--color-text); }
.nav-links a:hover::after { width: 100%; }
.nav-links a.nav-cta {
  color: var(--color-gold);
  border: 1px solid var(--color-line);
  border-radius: 999px;
  padding: 8px 22px;
  transition: background 0.3s, color 0.3s, border-color 0.3s;
}
.nav-links a.nav-cta::after { display: none; }
.nav-links a.nav-cta:hover { background: var(--color-gold); color: #1a1206; border-color: var(--color-gold); }

/* 语言切换 */
.nav-lang {
  font-size: 13px !important;
  letter-spacing: 2px !important;
  color: var(--color-cyan) !important;
  border: 1px solid rgba(56, 225, 198, 0.35);
  border-radius: 999px;
  padding: 6px 16px !important;
  transition: background 0.3s, color 0.3s;
}
.nav-lang::after { display: none; }
.nav-lang:hover { background: rgba(56, 225, 198, 0.14); color: var(--color-cyan) !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: transform 0.3s, opacity 0.3s;
}
.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); }

/* ============================================================
   Hero 主视觉
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(147, 161, 184, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(147, 161, 184, 0.055) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 75% 65% at 50% 45%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 75% 65% at 50% 45%, #000 30%, transparent 75%);
}
.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.5;
}
.hero-glow-gold {
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(232, 181, 77, 0.32), transparent 70%);
  top: -12%;
  right: -8%;
  animation: float-a 11s ease-in-out infinite;
}
.hero-glow-cyan {
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, rgba(56, 225, 198, 0.22), transparent 70%);
  bottom: -14%;
  left: -6%;
  animation: float-b 13s ease-in-out infinite;
}
@keyframes float-a {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-46px, 38px) scale(1.08); }
}
@keyframes float-b {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(52px, -34px) scale(1.06); }
}

.hero-content { position: relative; z-index: 1; max-width: 900px; padding: 0 32px; }

/* Hero 级联入场动画 */
.hero-anim {
  opacity: 0;
  transform: translateY(34px);
  animation: hero-in 1s var(--ease-out) forwards;
}
.hero-anim:nth-child(1) { animation-delay: 0.15s; }
.hero-anim:nth-child(2) { animation-delay: 0.3s; }
.hero-anim:nth-child(3) { animation-delay: 0.45s; }
.hero-anim:nth-child(4) { animation-delay: 0.6s; }
.hero-anim:nth-child(5) { animation-delay: 0.75s; }
.hero-anim:nth-child(6) { animation-delay: 0.9s; }
@keyframes hero-in {
  to { opacity: 1; transform: translateY(0); }
}

.hero-eyebrow {
  font-size: 13px;
  letter-spacing: 6px;
  text-transform: uppercase;
  color: var(--color-cyan);
  margin-bottom: 22px;
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(38px, 6vw, 68px);
  font-weight: 700;
  letter-spacing: 4px;
  line-height: 1.25;
  background: linear-gradient(120deg, #f7e2b0 10%, var(--color-gold) 45%, #c98f2b 75%, var(--color-gold-soft));
  background-size: 200% auto;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: hero-in 1s var(--ease-out) forwards, shimmer 5s linear 1.2s infinite;
}
@keyframes shimmer { to { background-position: 200% center; } }
.hero-title-en {
  margin-top: 16px;
  font-family: var(--font-display);
  font-size: clamp(14px, 1.6vw, 18px);
  letter-spacing: 3px;
  color: var(--color-text-dim);
}
.hero-divider { display: flex; justify-content: center; margin: 34px 0; }
.hero-divider i {
  width: 72px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
}
.hero-desc {
  max-width: 660px;
  margin: 0 auto;
  font-size: 16px;
  color: var(--color-text-dim);
}
.hero-actions { margin-top: 44px; display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }

/* 向下滚动指示 */
.hero-scroll {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  z-index: 1;
}
.hero-scroll-line {
  width: 1px;
  height: 52px;
  background: rgba(232, 181, 77, 0.35);
  position: relative;
  overflow: hidden;
}
.hero-scroll-line::after {
  content: "";
  position: absolute;
  top: -50%;
  left: 0;
  width: 100%;
  height: 50%;
  background: var(--color-gold);
  animation: scroll-drop 1.8s var(--ease-out) infinite;
}
@keyframes scroll-drop {
  to { top: 110%; }
}
.hero-scroll-text {
  font-size: 10px;
  letter-spacing: 4px;
  color: var(--color-text-dim);
}

/* ============================================================
   板块通用
   ============================================================ */
.section { padding: 120px 0; position: relative; }
.section-alt { background: var(--color-bg-alt); }

.section-head { text-align: center; margin-bottom: 68px; }
.section-label {
  font-size: 12px;
  letter-spacing: 5px;
  color: var(--color-cyan);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.section-title {
  font-family: var(--font-display);
  font-size: clamp(30px, 4vw, 42px);
  letter-spacing: 6px;
  font-weight: 700;
}
.section-title::after {
  content: "";
  display: block;
  width: 48px;
  height: 2px;
  margin: 20px auto 0;
  background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
}
.section-sub { margin-top: 18px; color: var(--color-text-dim); font-size: 15px; }

/* 滚动触发渐显 */
.reveal {
  opacity: 0;
  transform: translateY(42px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ============================================================
   关于我们
   ============================================================ */
.about-wrap {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 64px;
  align-items: start;
}
.about-quote { position: relative; padding-left: 8px; }
.about-quote-mark {
  display: block;
  font-family: var(--font-display);
  font-size: 96px;
  line-height: 0.8;
  color: var(--color-gold);
  opacity: 0.5;
  margin-bottom: 12px;
}
.about-intro {
  font-family: var(--font-display);
  font-size: clamp(20px, 2.4vw, 27px);
  line-height: 1.9;
  letter-spacing: 1px;
}
.about-side {
  border-left: 1px solid var(--color-line);
  padding-left: 40px;
}
.about-en-title {
  font-family: var(--font-display);
  font-size: 14px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 18px;
}
.about-intro-en {
  font-size: 14px;
  color: var(--color-text-dim);
  line-height: 2;
  font-style: italic;
}
.about-tags { margin-top: 26px; display: flex; gap: 12px; flex-wrap: wrap; }
.about-tags span {
  font-size: 12px;
  letter-spacing: 2px;
  color: var(--color-cyan);
  border: 1px solid rgba(56, 225, 198, 0.3);
  border-radius: 999px;
  padding: 6px 16px;
  transition: background 0.3s, color 0.3s;
}
.about-tags span:hover { background: rgba(56, 225, 198, 0.12); }

/* ============================================================
   主营业务卡片
   ============================================================ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.biz-card {
  position: relative;
  background: var(--color-card);
  border: 1px solid rgba(147, 161, 184, 0.12);
  border-radius: 16px;
  padding: 44px 34px 40px;
  overflow: hidden;
  transition: transform 0.45s var(--ease-out), box-shadow 0.45s var(--ease-out),
    border-color 0.45s;
}
.biz-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-gold), var(--color-cyan));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s var(--ease-out);
}
.biz-card:hover {
  transform: translateY(-10px);
  border-color: var(--color-line);
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.35);
}
.biz-card:hover::before { transform: scaleX(1); }
.biz-num {
  font-family: var(--font-display);
  font-size: 46px;
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1px rgba(232, 181, 77, 0.55);
  display: block;
  margin-bottom: 20px;
  line-height: 1;
}
.biz-card h3 {
  font-size: 19px;
  letter-spacing: 1.5px;
  margin-bottom: 14px;
}
.biz-card p { font-size: 14px; color: var(--color-text-dim); line-height: 1.9; }

/* ============================================================
   核心优势
   ============================================================ */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.adv-card {
  text-align: center;
  padding: 42px 24px 38px;
  border-radius: 16px;
  border: 1px solid transparent;
  transition: transform 0.45s var(--ease-out), border-color 0.45s, background 0.45s;
}
.adv-card:hover {
  transform: translateY(-8px);
  border-color: var(--color-line);
  background: rgba(232, 181, 77, 0.045);
}
.adv-icon {
  width: 68px;
  height: 68px;
  margin: 0 auto 22px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--color-line);
  color: var(--color-gold);
  transition: background 0.4s, transform 0.4s var(--ease-out);
}
.adv-card:hover .adv-icon {
  background: rgba(232, 181, 77, 0.12);
  transform: scale(1.08) rotate(-4deg);
}
.adv-icon svg { width: 30px; height: 30px; }
.adv-card h3 { font-size: 17px; letter-spacing: 2px; margin-bottom: 10px; }
.adv-card p { font-size: 13px; color: var(--color-text-dim); line-height: 1.8; }

/* 数据展示 */
.stats {
  margin-top: 100px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  border-top: 1px solid rgba(147, 161, 184, 0.14);
  padding-top: 64px;
}
.stat-item { text-align: center; }
.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(38px, 4.5vw, 54px);
  font-weight: 700;
  color: var(--color-gold);
  line-height: 1.1;
}
.stat-label {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--color-text-dim);
}

/* ============================================================
   联系我们
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  max-width: 860px;
  margin: 0 auto;
}
.contact-card {
  display: flex;
  align-items: center;
  gap: 24px;
  background: var(--color-card);
  border: 1px solid rgba(147, 161, 184, 0.12);
  border-radius: 16px;
  padding: 36px 34px;
  transition: transform 0.45s var(--ease-out), border-color 0.45s, box-shadow 0.45s;
}
.contact-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-gold);
  box-shadow: 0 20px 44px rgba(0, 0, 0, 0.35);
}
.contact-icon {
  flex-shrink: 0;
  width: 62px;
  height: 62px;
  display: grid;
  place-items: center;
  border-radius: 14px;
  background: rgba(232, 181, 77, 0.1);
  border: 1px solid var(--color-line);
  color: var(--color-gold);
}
.contact-icon svg { width: 28px; height: 28px; }
.contact-label { font-size: 12px; letter-spacing: 3px; color: var(--color-text-dim); margin-bottom: 6px; }
.contact-value {
  font-family: var(--font-display);
  font-size: clamp(17px, 2vw, 21px);
  letter-spacing: 1px;
  color: var(--color-text);
}

/* ============================================================
   页脚
   ============================================================ */
.footer {
  border-top: 1px solid rgba(147, 161, 184, 0.12);
  padding: 48px 0;
}
.footer-inner { text-align: center; }
.footer-brand strong {
  display: block;
  font-size: 17px;
  letter-spacing: 3px;
}
.footer-brand small {
  display: block;
  margin-top: 6px;
  font-size: 11px;
  letter-spacing: 2px;
  color: var(--color-text-dim);
  text-transform: uppercase;
}
.footer-copy {
  margin-top: 24px;
  font-size: 12px;
  color: var(--color-text-dim);
  letter-spacing: 1px;
}
.footer-icp {
  margin-top: 8px;
  font-size: 12px;
  color: rgba(147, 161, 184, 0.65);
  letter-spacing: 1px;
}

/* 英文版：拉丁文主标题与简介字号微调（英文全称较长） */
.hero-title-latin {
  font-size: clamp(26px, 4vw, 46px);
  letter-spacing: 1px;
  line-height: 1.3;
}
.about-intro-latin {
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.85;
}

/* ============================================================
   响应式适配
   ============================================================ */
@media (max-width: 960px) {
  .about-wrap { grid-template-columns: 1fr; gap: 44px; }
  .about-side { border-left: none; padding-left: 0; border-top: 1px solid var(--color-line); padding-top: 36px; }
  .card-grid { grid-template-columns: 1fr; }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 40px 24px; }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    right: 0;
    left: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(10, 22, 40, 0.96);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-line);
    padding: 12px 32px 24px;
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.35s, transform 0.35s var(--ease-out);
  }
  .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-links a { padding: 14px 0; border-bottom: 1px solid rgba(147, 161, 184, 0.1); }
  .nav-links a.nav-cta { border: none; padding: 14px 0; text-align: left; }
  .section { padding: 84px 0; }
  .contact-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: center; }
  .nav-logo-text small { display: none; }
}

/* 尊重系统减弱动画设置 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .reveal, .hero-anim { opacity: 1; transform: none; }
}