/* ========== 基础重置 ========== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
               "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #e8e8e8;
  background: #0a0a0a;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: color .2s ease; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

/* ========== 颜色变量 ========== */
:root {
  --bg: #0a0a0a;
  --bg-alt: #111111;
  --bg-soft: #1a1a1a;
  --text: #e8e8e8;
  --text-soft: #a0a0a0;
  --text-dim: #6a6a6a;
  --accent: #ff6a1a;          /* 品牌橙 */
  --accent-2: #ff8c42;
  --border: rgba(255,255,255,.08);
  --radius: 14px;
  --shadow: 0 10px 40px rgba(0,0,0,.4);
}

/* ========== 通用容器 ========== */
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 100px 0; position: relative; }
.section-alt { background: var(--bg-alt); }

.section-head { text-align: center; margin-bottom: 64px; }
.eyebrow {
  color: var(--accent);
  font-size: 13px;
  letter-spacing: 4px;
  font-weight: 600;
  margin-bottom: 12px;
}
.section-title {
  font-size: 42px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: -1px;
}
.section-desc {
  color: var(--text-soft);
  font-size: 17px;
  max-width: 600px;
  margin: 0 auto;
}
.accent { color: var(--accent); }

/* ========== 按钮 ========== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 24px; border-radius: 10px;
  font-weight: 600; font-size: 15px;
  transition: all .25s ease; white-space: nowrap;
}
.btn-lg { padding: 16px 32px; font-size: 16px; }
.btn-block { width: 100%; }
.btn-primary {
  background: var(--accent); color: #fff;
  box-shadow: 0 8px 24px rgba(255,106,26,.3);
}
.btn-primary:hover {
  background: var(--accent-2);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(255,106,26,.45);
}
.btn-ghost {
  background: transparent; color: #fff;
  border: 1.5px solid var(--border);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ========== 导航 ========== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 18px 0;
  background: rgba(10,10,10,.6);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: all .3s ease;
}
.navbar.scrolled {
  background: rgba(10,10,10,.92);
  border-bottom-color: var(--border);
  padding: 12px 0;
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; }
.logo-img {
  width: 40px; height: 40px;
  object-fit: contain; display: block;
  border-radius: 8px;
}
.logo-text { color: #fff; font-size: 18px; letter-spacing: .5px; }
.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a {
  color: var(--text-soft); font-size: 15px; font-weight: 500;
  position: relative;
}
.nav-links a:not(.btn):hover { color: #fff; }
.nav-links a:not(.btn)::after {
  content: ''; position: absolute; left: 0; bottom: -6px;
  width: 0; height: 2px; background: var(--accent);
  transition: width .3s ease;
}
.nav-links a:not(.btn):hover::after { width: 100%; }
.nav-cta { padding: 10px 20px !important; font-size: 14px !important; }

.menu-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.menu-toggle span { width: 24px; height: 2px; background: #fff; transition: all .3s; }
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ========== Hero ========== */
.hero {
  position: relative;
  min-height: 100vh;
  padding: 140px 0 80px;
  display: flex; align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background:
    linear-gradient(90deg, rgba(10,10,10,.93) 0%, rgba(10,10,10,.78) 45%, rgba(10,10,10,.45) 100%),
    radial-gradient(ellipse 70% 60% at 85% 25%, rgba(255,106,26,.2), transparent 65%),
    url('https://trae-api-cn.mchost.guru/api/ide/v1/text_to_image?prompt=Quiet%20luxury%20cream%202.0%20living%20room%20in%20daytime%2C%20matte%20microcement%20walls%20with%20subtle%20limewash%20texture%2C%20oatmeal%20greige%20palette%20with%20deep%20walnut%20wood%20accents%2C%20dramatic%20layered%20no-main-light%20design%2C%20sharp%20scallop-shaped%20wall%20washing%20light%20gradients%20on%20feature%20wall%2C%20museum-quality%20accent%20light%20pools%20on%20floor%2C%20visible%20recessed%20luminaire%20details%20with%20deep%20black%20reflector%20cups%2C%20slim%20magnetic%20track%20lights%2C%20strong%20light-shadow%20contrast%20with%20smooth%20transitions%2C%20warm%20white%203500K%2C%20linen%20sofa%2C%20walnut%20coffee%20table%2C%20matte%20stone%20side%20table%2C%20japandi%20quiet%20luxury%20atmosphere%2C%20photorealistic%20high-end%20interior%20magazine%20quality%2C%20no%20overexposure&image_size=landscape_16_9') center/cover no-repeat;
  filter: brightness(1.18) contrast(1.05) saturate(1.12) sepia(0.08);
}
.hero-content { position: relative; z-index: 1; max-width: 900px; }
.hero-title {
  font-size: clamp(40px, 7vw, 72px);
  font-weight: 800;
  line-height: 1.15;
  color: #fff;
  letter-spacing: -1.5px;
  margin: 20px 0 24px;
}
.hero-subtitle {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--text-soft);
  max-width: 640px;
  margin-bottom: 40px;
  line-height: 1.7;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 80px; }
.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  padding: 32px; background: rgba(255,255,255,.03);
  border: 1px solid var(--border); border-radius: var(--radius);
  backdrop-filter: blur(10px);
}
.stat strong {
  display: block; font-size: 36px; font-weight: 800; color: var(--accent);
  line-height: 1.2; letter-spacing: -1px;
}
.stat strong small { font-size: 18px; font-weight: 600; }
.stat span { color: var(--text-soft); font-size: 14px; }
.scroll-hint {
  position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%);
  color: var(--text-dim); font-size: 12px; letter-spacing: 2px;
  animation: bounce 2s infinite;
}
@keyframes bounce {
  0%, 100% { transform: translate(-50%, 0); opacity: .6; }
  50% { transform: translate(-50%, 8px); opacity: 1; }
}

/* ========== 关于 ========== */
.about-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center;
}
.about-text h3 { font-size: 28px; color: #fff; margin-bottom: 20px; }
.about-text p { color: var(--text-soft); margin-bottom: 16px; line-height: 1.8; }
.about-list { margin-top: 24px; }
.about-list li {
  color: #fff; padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 15px;
}
.about-list li:last-child { border-bottom: none; }

.about-visual {
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
.about-photo {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  aspect-ratio: 4 / 3;
  background: var(--bg-soft);
}
.about-photo img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
  display: block;
  filter: brightness(1.18) contrast(1.06) saturate(1.12) sepia(0.1) hue-rotate(-2deg);
}
.about-photo:hover img { transform: scale(1.06); }

/* ========== 服务 ========== */
.service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.service-card {
  position: relative;
  padding: 0;
  background: var(--bg-soft); border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all .3s ease;
  display: flex; flex-direction: column;
}
.service-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent);
  box-shadow: 0 16px 48px rgba(255,106,26,.15);
}
.service-card.featured {
  background: linear-gradient(160deg, rgba(255,106,26,.08), var(--bg-soft));
  border-color: rgba(255,106,26,.3);
}
.badge {
  position: absolute; top: 16px; right: 16px;
  background: var(--accent); color: #fff;
  font-size: 12px; font-weight: 600;
  padding: 4px 10px; border-radius: 20px;
  z-index: 2;
}
/* 带图产品卡 */
.service-img {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.service-img img {
  width: 100%; height: 100%;
  object-fit: cover; display: block;
  transition: transform .5s ease;
}
/* AI 效果图统一暖调提亮（实拍图 magnet-track 保持原色） */
.service-img img:not([src="magnet-track.png"]) {
  filter: brightness(1.18) contrast(1.06) saturate(1.12) sepia(0.1) hue-rotate(-2deg);
}
.service-card:hover .service-img img { transform: scale(1.06); }
/* 纯文字卡（服务类）补回内边距 */
.service-card.service-only { padding: 36px 28px; }
/* 卡片内容区 */
.service-card > h3,
.service-card > p,
.service-card > ul {
  margin-left: 28px; margin-right: 28px;
}
.service-card > h3 { margin-top: 24px; }
.service-card > p { margin-bottom: 16px; }
.service-card > ul { margin-bottom: 28px; }
.service-icon {
  width: 56px; height: 56px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,106,26,.12);
  color: var(--accent);
  border-radius: 12px;
  margin-bottom: 20px;
}
.service-icon svg { width: 28px; height: 28px; }
.service-card h3 { color: #fff; font-size: 20px; margin-bottom: 12px; }
.service-card p { color: var(--text-soft); font-size: 15px; margin-bottom: 16px; line-height: 1.7; }
.service-card ul li {
  color: var(--text-soft); font-size: 13px;
  padding: 4px 0;
}

/* ========== 整体效果展示（智能模式） ========== */
.scene-tabs {
  display: flex; justify-content: center; gap: 14px;
  flex-wrap: wrap; margin-bottom: 32px;
}
.scene-tab {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 26px;
  font-size: 15px; font-weight: 600;
  color: var(--text-soft);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 30px;
  transition: all .25s ease;
}
.scene-tab:hover { border-color: var(--accent); color: #fff; }
.scene-tab.active {
  background: var(--accent); color: #fff;
  border-color: var(--accent);
  box-shadow: 0 6px 20px rgba(255,106,26,.35);
}
.scene-icon { font-size: 17px; }

.showcase-frame {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.showcase-frame img {
  width: 100%; display: block;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform .6s ease, opacity .3s ease;
  filter: saturate(1.08) sepia(0.06);
}
.showcase-frame:hover img { transform: scale(1.03); }
.showcase-video-frame video {
  width: 100%; display: block;
  height: auto;
  max-height: 85vh;
  object-fit: contain;
  background: #000;
}
/* 竖屏视频：桌面端限制宽度居中，手机端全宽 */
.showcase-video-frame.portrait { max-width: 480px; margin: 0 auto; }
@media (max-width: 720px) {
  .showcase-video-frame.portrait { max-width: 100%; }
  .showcase-video-frame video { max-height: 70vh; }
}
/* 标签条：视频下方独立一行，不遮挡画面 */
.showcase-tags {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 12px;
  padding: 16px 20px 0;
  position: static;
}
.showcase-tags span {
  padding: 8px 16px;
  font-size: 14px; font-weight: 500;
  color: #fff;
  background: rgba(255,106,26,.85);
  border-radius: 20px;
  backdrop-filter: blur(6px);
}
/* 模式状态条：视频下方独立一行，不遮挡画面 */
.scene-status {
  position: static;
  display: flex; align-items: center; gap: 12px;
  margin: 14px auto 0; width: fit-content;
  padding: 12px 18px;
  background: rgba(10,10,10,.72);
  border: 1px solid var(--border);
  border-radius: 12px;
  backdrop-filter: blur(10px);
  pointer-events: none;
}
.scene-dot {
  width: 9px; height: 9px; border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 8px #4ade80;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .4; }
}
#sceneName { color: #fff; font-size: 15px; font-weight: 600; }
.scene-dim { color: var(--text-soft); font-size: 13px; }
.scene-note {
  text-align: center; color: var(--text-dim);
  font-size: 13px; margin-top: 20px;
}
@media (max-width: 720px) {
  .showcase-tags { gap: 8px; padding: 12px 12px 0; }
  .showcase-tags span { padding: 6px 12px; font-size: 12px; }
  .scene-status { flex-wrap: wrap; justify-content: center; gap: 8px; padding: 10px 14px; margin-top: 12px; }
  .scene-dim { width: 100%; text-align: center; }
}

/* ========== 联系 ========== */
.contact-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: 56px; }
.contact-info h3 { color: #fff; font-size: 26px; margin-bottom: 12px; }
.contact-desc { color: var(--text-soft); margin-bottom: 32px; line-height: 1.7; }
.info-item {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 18px 0; border-bottom: 1px solid var(--border);
}
.info-item:last-child { border-bottom: none; }
.info-icon {
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,106,26,.1);
  border-radius: 10px;
  font-size: 20px; flex-shrink: 0;
}
.info-label { color: var(--text-dim); font-size: 13px; margin-bottom: 4px; }
.info-value { color: #fff; font-size: 15px; }

.contact-form {
  background: var(--bg-soft); padding: 40px;
  border-radius: var(--radius); border: 1px solid var(--border);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { margin-bottom: 20px; }
.form-group label {
  display: block; color: #fff; font-size: 14px; font-weight: 500;
  margin-bottom: 8px;
}
.form-group label span { color: var(--accent); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 14px 16px;
  background: var(--bg); color: #fff;
  border: 1px solid var(--border); border-radius: 10px;
  font-size: 15px; font-family: inherit;
  transition: all .2s ease;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(255,106,26,.15);
}
.form-group textarea { resize: vertical; }
.form-tip { margin-top: 12px; font-size: 14px; text-align: center; }
.form-tip.success { color: #4ade80; }
.form-tip.error { color: #f87171; }

/* ========== 页脚 ========== */
.footer { background: #060606; border-top: 1px solid var(--border); padding-top: 60px; }
.footer-inner { display: grid; grid-template-columns: 1.5fr 2fr; gap: 60px; padding-bottom: 50px; }
.footer-brand p { color: var(--text-soft); margin-top: 16px; max-width: 300px; }
.footer-cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.footer-cols h5 { color: #fff; font-size: 15px; margin-bottom: 16px; }
.footer-cols a {
  display: block; color: var(--text-soft); font-size: 14px;
  padding: 4px 0;
}
.footer-cols a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 24px 0;
}
.footer-bottom .container {
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
}
.footer-bottom p { color: var(--text-dim); font-size: 13px; }
.footer-bottom a { color: var(--text-dim); transition: color .2s; }
.footer-bottom a:hover { color: var(--accent); }

/* ========== 回到顶部 ========== */
.back-top {
  position: fixed; right: 28px; bottom: 28px;
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent); color: #fff;
  border-radius: 50%; font-size: 20px; font-weight: 700;
  box-shadow: 0 6px 20px rgba(255,106,26,.4);
  opacity: 0; visibility: hidden;
  transform: translateY(20px);
  transition: all .3s ease;
  z-index: 50;
}
.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { background: var(--accent-2); transform: translateY(-4px); }

/* ========== 入场动画 ========== */
.fade-in { opacity: 0; transform: translateY(30px); transition: all .8s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ========== 响应式 ========== */
@media (max-width: 960px) {
  .section { padding: 70px 0; }
  .section-title { font-size: 32px; }
  .hero { min-height: auto; padding: 120px 0 60px; }
  .hero-stats { grid-template-columns: 1fr 1fr; padding: 24px; }
  .stat strong { font-size: 28px; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .service-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .footer-inner { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 720px) {
  .nav-links {
    position: fixed; top: 0; right: -100%;
    width: 78%; max-width: 320px; height: 100vh;
    background: #0e0e0e;
    flex-direction: column; align-items: flex-start;
    padding: 90px 28px 28px;
    gap: 20px;
    border-left: 1px solid var(--border);
    transition: right .35s ease;
  }
  .nav-links.open { right: 0; }
  .nav-links a { font-size: 17px; }
  .menu-toggle { display: flex; z-index: 110; }
  .nav-cta { width: 100%; justify-content: center; }

  .section-title { font-size: 28px; }
  .hero-title { font-size: 38px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .hero-stats { grid-template-columns: 1fr 1fr; gap: 16px; }
  .about-visual { grid-template-columns: 1fr 1fr; }
  .service-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .contact-form { padding: 28px 22px; }
  .footer-cols { grid-template-columns: 1fr 1fr; }
  .footer-bottom .container { flex-direction: column; text-align: center; }
  .scroll-hint { display: none; }
}