/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; font-size: 16px; scroll-snap-type: y mandatory; }
body { font-family: 'Gill Sans', 'Noto Sans SC', 'Helvetica Neue', sans-serif; color: #efecea; background: #001522; line-height: 1.7; overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img, video { max-width: 100%; height: auto; display: block; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }

:root {
  --deep-blue: #001522;
  --deep-blue-2: #071c2b;
  --gold: #af8061;
  --gold-light: #c9a07a;
  --light: #efecea;
  --muted: rgba(239, 236, 234, 0.62);
}

/* ===== Header ===== */
.site-header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: 22px 50px; display: flex; align-items: center; justify-content: space-between; transition: background 0.4s, padding 0.4s, box-shadow 0.4s; }
.site-header.scrolled { background: rgba(0, 21, 34, 0.95); padding: 12px 50px; box-shadow: 0 2px 20px rgba(0,0,0,0.3); }
.logo { display: inline-flex; align-items: center; }
.logo img { height: 32px; width: auto; display: block; transition: height 0.4s; }
.site-header.scrolled .logo img { height: 26px; }
.logo .accent { color: var(--gold); }
.main-nav { display: flex; align-items: center; gap: 34px; }
.main-nav a { font-size: 13px; font-weight: 500; letter-spacing: 1.5px; text-transform: uppercase; position: relative; padding: 4px 0; transition: color 0.3s; }
.main-nav a::after { content:''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px; background: var(--gold); transition: width 0.3s; }
.main-nav a:hover { color: var(--gold); }
.main-nav a:hover::after { width: 100%; }
.hamburger { display: none; flex-direction: column; gap: 5px; width: 28px; cursor: pointer; z-index: 1001; }
.hamburger span { display: block; height: 2px; background: var(--light); transition: 0.3s; }

/* ===== Hero (全屏视频) ===== */
.hero-section { height: 100vh; min-height: 600px; position: relative; display: flex; align-items: center; justify-content: center; overflow: hidden; scroll-snap-align: start; }
.video-bg { position: absolute; inset: 0; z-index: 0; overflow: hidden; background: linear-gradient(135deg, #001522 0%, #0a2030 50%, #1a3040 100%); }
.video-bg video, .video-bg img { width: 100%; height: 100%; object-fit: cover; }
.overlay { position: absolute; inset: 0; z-index: 1; }
.overlay--grad { background: linear-gradient(135deg, rgba(0,21,34,0.86), rgba(0,21,34,0.70)); }

/* ===== Hero 漂浮光斑（呼应"金棕光数字流线"港口图） ===== */
.hero-section::before, .hero-section::after { content: ''; position: absolute; border-radius: 50%; pointer-events: none; z-index: 1; background: radial-gradient(circle, rgba(175,128,97,0.35) 0%, rgba(175,128,97,0) 70%); filter: blur(8px); }
.hero-section::before { width: 380px; height: 380px; top: 12%; left: 8%; animation: floatA 14s ease-in-out infinite; }
.hero-section::after { width: 300px; height: 300px; bottom: 14%; right: 10%; animation: floatB 18s ease-in-out infinite; }
@keyframes floatA { 0%,100% { transform: translate(0, 0); opacity: 0.7; } 50% { transform: translate(40px, -30px); opacity: 1; } }
@keyframes floatB { 0%,100% { transform: translate(0, 0); opacity: 0.5; } 50% { transform: translate(-50px, 30px); opacity: 0.9; } }
.hero-content { position: relative; z-index: 2; text-align: center; padding: 0 30px; max-width: 920px; }
.hero-content .eyebrow { font-size: 13px; letter-spacing: 6px; text-transform: uppercase; color: var(--gold); margin-bottom: 22px; }
.hero-content h1 { font-size: 66px; font-weight: 300; letter-spacing: 6px; text-transform: uppercase; line-height: 1.15; margin-bottom: 22px; text-shadow: 0 2px 20px rgba(0,0,0,0.4); }
.hero-content .subtitle { font-size: 20px; font-weight: 300; letter-spacing: 1.5px; color: rgba(239,236,234,0.9); margin-bottom: 38px; }
.hero-content .subtitle strong { color: var(--gold-light); font-weight: 400; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.scroll-hint { position: absolute; bottom: 36px; left: 50%; transform: translateX(-50%); z-index: 3; display: flex; flex-direction: column; align-items: center; gap: 8px; opacity: 0.6; animation: bounce 2s infinite 1.8s; }
.scroll-hint span { font-size: 11px; letter-spacing: 2px; text-transform: uppercase; }
.scroll-hint .arrow { width: 18px; height: 18px; border-right: 1px solid var(--light); border-bottom: 1px solid var(--light); transform: rotate(45deg); }
@keyframes bounce { 0%,100%{transform:translateX(-50%) translateY(0);} 50%{transform:translateX(-50%) translateY(8px);} }

/* ===== Hero 首屏分步入场 ===== */
.hero-stagger > * { opacity: 0; animation: heroFadeIn 0.9s cubic-bezier(0.22, 1, 0.36, 1) forwards; }
.hero-stagger > *:nth-child(1) { animation-delay: 0.3s; }
.hero-stagger > *:nth-child(2) { animation-delay: 0.5s; }
.hero-stagger > *:nth-child(3) { animation-delay: 0.75s; }
.hero-stagger > *:nth-child(4) { animation-delay: 1.0s; }
@keyframes heroFadeIn {
  from { opacity: 0; transform: translateY(28px); filter: blur(4px); }
  to   { opacity: 1; transform: translateY(0); filter: blur(0); }
}

/* ===== 滚动入场动效 ===== */
.fade-in { opacity: 0; transform: translateY(36px); transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1), transform 0.8s cubic-bezier(0.22, 1, 0.36, 1); will-change: opacity, transform; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ===== 右侧 Section 圆点指示器 ===== */
.section-indicator { position: fixed; right: 32px; top: 50%; transform: translateY(-50%); z-index: 50; display: flex; flex-direction: column; gap: 14px; }
.section-indicator .dot { width: 10px; height: 10px; border-radius: 50%; border: 1px solid rgba(175, 128, 97, 0.55); background: transparent; cursor: pointer; position: relative; transition: all 0.35s ease; }
.section-indicator .dot::after { content: attr(data-label); position: absolute; right: 22px; top: 50%; transform: translateY(-50%); font-size: 11px; letter-spacing: 2px; text-transform: uppercase; color: var(--gold-light); white-space: nowrap; opacity: 0; pointer-events: none; transition: opacity 0.3s; }
.section-indicator .dot:hover { border-color: var(--gold); background: rgba(175, 128, 97, 0.22); }
.section-indicator .dot:hover::after { opacity: 1; }
.section-indicator .dot.active { background: var(--gold); border-color: var(--gold); transform: scale(1.25); }

/* ===== Content Sections ===== */
.content-section { padding: 110px 40px; position: relative; overflow: hidden; min-height: 100vh; display: flex; align-items: center; scroll-snap-align: start; }
.content-section--alt { background: var(--deep-blue-2); }
.container { max-width: 1200px; margin: 0 auto; position: relative; z-index: 2; width: 100%; }

/* 带背景图的 section：背景图 + 深蓝渐变遮罩 */
.section-bg-layer { position: absolute; inset: 0; z-index: 0; background-size: cover; background-position: center; background-repeat: no-repeat; transform: translateY(var(--py, 0px)) scale(1.12); will-change: transform; }
.section-bg-overlay { position: absolute; inset: 0; z-index: 1; background: linear-gradient(135deg, rgba(0,21,34,0.90), rgba(0,21,34,0.80)); }
.section-bg-overlay--deep { background: linear-gradient(180deg, rgba(0,21,34,0.95) 0%, rgba(0,21,34,0.88) 45%, rgba(0,21,34,0.88) 55%, rgba(0,21,34,0.95) 100% ); }

/* Section title */
.section-title { text-align: center; margin-bottom: 60px; }
.section-title .label { font-size: 12px; letter-spacing: 4px; text-transform: uppercase; color: var(--gold); margin-bottom: 14px; }
.section-title h2 { font-size: 42px; font-weight: 300; letter-spacing: 3px; margin-bottom: 16px; }
.section-title .accent-line { width: 60px; height: 2px; background: var(--gold); margin: 0 auto; }
.section-title .desc { margin-top: 20px; font-size: 16px; color: var(--muted); max-width: 680px; margin-left: auto; margin-right: auto; }

/* Lead text (关于) */
.lead-text { font-size: 24px; font-weight: 300; line-height: 1.7; letter-spacing: 1px; max-width: 820px; margin: 0 auto 60px; text-align: center; }
.lead-text strong { color: var(--gold-light); font-weight: 400; }

/* Features grid (亮点) */
.features { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; max-width: 1100px; margin: 0 auto; }
.feature { text-align: center; }
.feature .icon { width: 52px; height: 52px; margin: 0 auto 18px; color: var(--gold); }
.feature .icon svg { width: 100%; height: 100%; stroke: var(--gold); fill: none; stroke-width: 1.4; }
.feature h3 { font-size: 16px; font-weight: 500; letter-spacing: 1px; margin-bottom: 10px; }
.feature p { font-size: 13px; color: var(--muted); line-height: 1.7; }

/* Cards grid */
.grid { display: grid; gap: 24px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.card { background: rgba(255,255,255,0.03); border: 1px solid rgba(175,128,97,0.22); padding: 38px 28px; transition: all 0.4s; position: relative; }
.card:hover { background: rgba(175,128,97,0.08); border-color: var(--gold); transform: translateY(-6px); }
.card .icon { width: 44px; height: 44px; margin-bottom: 20px; }
.card .icon svg { width: 100%; height: 100%; stroke: var(--gold); fill: none; stroke-width: 1.4; }
.card .num { font-size: 13px; letter-spacing: 3px; color: var(--gold); margin-bottom: 16px; }
.card h3 { font-size: 19px; font-weight: 500; letter-spacing: 1px; margin-bottom: 12px; }
.card p { font-size: 14px; color: var(--muted); line-height: 1.8; }

/* Partners */
.partner-featured { text-align: center; max-width: 760px; margin: 0 auto 32px; border: 1px solid rgba(175,128,97,0.3); padding: 30px 40px; background: rgba(175,128,97,0.05); }
.partner-featured .tag { font-size: 12px; letter-spacing: 3px; color: var(--gold); text-transform: uppercase; margin-bottom: 10px; }
.partner-featured .name { font-size: 34px; font-weight: 300; letter-spacing: 4px; margin-bottom: 12px; }
.partner-featured .desc { font-size: 14px; color: var(--muted); line-height: 1.85; }
.partner-featured .landmarks { margin-top: 12px; font-size: 13px; color: var(--gold-light); letter-spacing: 1px; }
.partner-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; max-width: 760px; margin: 0 auto; }

/* Mission */
.mission-block { text-align: center; margin-bottom: 50px; }
.mission-block:last-child { margin-bottom: 0; }
.mission-block .key { font-size: 12px; letter-spacing: 4px; text-transform: uppercase; color: var(--gold); margin-bottom: 16px; }
.mission-block .text { font-size: 30px; font-weight: 300; letter-spacing: 2px; line-height: 1.5; max-width: 760px; margin: 0 auto; }
.mission-cta { text-align: center; margin-top: 50px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 14px 34px; font-size: 13px; font-weight: 600; letter-spacing: 2px; text-transform: uppercase; border: 1px solid var(--gold); color: var(--light); transition: all 0.4s; cursor: pointer; }
.btn:hover { background: var(--gold); color: var(--deep-blue); }
.btn-primary { background: var(--gold); color: var(--deep-blue); border-color: var(--gold); }
.btn-primary:hover { background: transparent; color: var(--light); }

/* Footer（精简版权栏） */
.site-footer { background: var(--deep-blue-2); border-top: 1px solid rgba(175,128,97,0.2); padding: 30px 40px; }
.footer-bottom { max-width: 1200px; margin: 0 auto; text-align: center; font-size: 13px; color: rgba(239,236,234,0.55); }
.footer-logo-inline { height: 26px; width: auto; margin: 0 auto 12px; opacity: 0.9; display: block; }
.footer-icp { margin-top: 8px; }
.footer-icp a { color: rgba(239,236,234,0.5); transition: color 0.3s; }
.footer-icp a:hover { color: var(--gold); }

/* partners 区：锁定一屏高度（100vh），flex 垂直居中 container，避免底部 padding 露出深色空带 */
#partners { min-height: 100vh; padding: 80px 40px; }
#partners .container { display: flex; flex-direction: column; justify-content: center; gap: 32px; min-height: calc(100vh - 160px); }
#partners .partner-row { margin-bottom: 0; }
#partners .partner-featured { margin: 0 auto; }

/* ===== 项目案例展示 ===== */
#cases { min-height: auto; padding: 110px 40px 90px; }
#cases-teaser { min-height: auto; padding: 110px 40px 90px; }
.container--narrow { max-width: 920px; }

/* ===== 内页通用：禁用 scroll-snap ===== */
body.page-inner { background: var(--deep-blue); }
body.page-inner html, body.page-inner { scroll-snap-type: none; }
.page-inner .content-section { min-height: auto; }

/* ===== 内页 Hero（小标题屏） ===== */
.page-hero { position: relative; height: 56vh; min-height: 380px; display: flex; align-items: center; justify-content: center; overflow: hidden; margin-top: 0; }
.page-hero__bg { position: absolute; inset: 0; background-size: cover; background-position: center; transform: scale(1.08); will-change: transform; }
.page-hero__overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(0,21,34,0.88), rgba(0,21,34,0.70)); }
.page-hero__content { position: relative; z-index: 2; text-align: center; padding: 0 30px; max-width: 820px; }
.page-hero__content .eyebrow { font-size: 12px; letter-spacing: 5px; text-transform: uppercase; color: var(--gold); margin-bottom: 18px; }
.page-hero__content h1 { font-size: 50px; font-weight: 300; letter-spacing: 5px; margin-bottom: 18px; text-shadow: 0 2px 20px rgba(0,0,0,0.4); }
.page-hero__content .subtitle { font-size: 17px; font-weight: 300; letter-spacing: 1.5px; color: rgba(239,236,234,0.85); line-height: 1.7; }

/* ===== 内页 main 区 ===== */
.page-main { padding: 100px 40px 80px; }
.page-main--narrow .container { max-width: 920px; }

/* ===== Slim Footer（所有页面共用） ===== */
.site-footer-slim { background: var(--deep-blue-2); border-top: 1px solid rgba(175,128,97,0.2); padding: 32px 40px 24px; text-align: center; }
.site-footer-slim .footer-logo-inline { height: 26px; width: auto; margin: 0 auto 12px; opacity: 0.9; display: block; }
.site-footer-slim p { font-size: 12px; color: rgba(239,236,234,0.55); line-height: 1.8; letter-spacing: 0.5px; }
.site-footer-slim .footer-icp { margin-top: 6px; }
.site-footer-slim .footer-icp a { color: rgba(239,236,234,0.5); transition: color 0.3s; }
.site-footer-slim .footer-icp a:hover { color: var(--gold); }

/* ===== 首页 mission-cta 简短入口 ===== */
#mission-cta { min-height: 100vh; }
.mission-cta-block { text-align: center; }
.mission-eyebrow { font-size: 12px; letter-spacing: 5px; text-transform: uppercase; color: var(--gold); margin-bottom: 22px; }
.mission-headline { font-size: 44px; font-weight: 300; letter-spacing: 4px; line-height: 1.4; margin-bottom: 22px; }
.mission-subline { font-size: 18px; font-weight: 300; letter-spacing: 1.5px; color: rgba(239,236,234,0.8); margin-bottom: 44px; }

/* ===== contact 页：使命陈述+联系方式 ===== */
.mission-statement { text-align: center; padding: 20px 0 80px; }
.mission-statement .mission-block--large { margin-bottom: 50px; }
.mission-statement .mission-block--large:last-child { margin-bottom: 0; }
.mission-statement .key { font-size: 12px; letter-spacing: 5px; text-transform: uppercase; color: var(--gold); margin-bottom: 20px; }
.mission-statement .text { font-size: 30px; font-weight: 300; letter-spacing: 2px; line-height: 1.55; max-width: 760px; margin: 0 auto; }

.contact-section { text-align: center; padding: 60px 0 20px; border-top: 1px solid rgba(175,128,97,0.22); margin-top: 20px; }
.contact-section__label { font-size: 11px; letter-spacing: 5px; text-transform: uppercase; color: var(--gold); margin-bottom: 14px; }
.contact-section__title { font-size: 38px; font-weight: 300; letter-spacing: 4px; margin-bottom: 16px; }
.contact-section .accent-line { width: 60px; height: 2px; background: var(--gold); margin: 0 auto 50px; }

.contact-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 36px 60px; max-width: 760px; margin: 0 auto 40px; }
.contact-item { text-align: center; }
.contact-item .ci-label { display: block; font-size: 11px; letter-spacing: 3px; text-transform: uppercase; color: var(--gold); margin-bottom: 12px; }
.contact-item .ci-value { display: inline-block; font-size: 16px; color: var(--light); letter-spacing: 1px; line-height: 1.7; transition: color 0.3s; }
.contact-item .ci-value.ci-tel { font-size: 22px; color: var(--gold-light); font-weight: 500; letter-spacing: 2px; }
.contact-item a.ci-value:hover { color: var(--gold); }
.contact-item .ci-wechat-btn { background: rgba(7,193,96,0.12); border: 1px solid rgba(7,193,96,0.4); padding: 10px 22px; border-radius: 4px; color: #07c160; cursor: pointer; font-family: inherit; transition: all 0.3s; }
.contact-item .ci-wechat-btn:hover { background: rgba(7,193,96,0.2); border-color: #07c160; }
.contact-business { font-size: 12px; color: var(--muted); letter-spacing: 2px; margin-top: 30px; opacity: 0.7; }

/* ===== 内页 active 导航高亮 ===== */
.main-nav a.active { color: var(--gold); }
.main-nav a.active::after { width: 100%; }

/* ===== 内页 CTA（cases 底部） ===== */
.page-cta { text-align: center; padding: 80px 0 20px; margin-top: 40px; border-top: 1px solid rgba(175,128,97,0.22); }
.page-cta__title { font-size: 26px; font-weight: 300; letter-spacing: 3px; margin-bottom: 14px; }
.page-cta__desc { font-size: 14px; color: var(--muted); margin-bottom: 32px; letter-spacing: 1px; }
.case-header { display: grid; grid-template-columns: 1fr 1.4fr; gap: 50px; max-width: 1080px; margin: 0 auto 80px; align-items: center; }
.case-header__title .case-tag { font-size: 11px; letter-spacing: 4px; color: var(--gold); text-transform: uppercase; margin-bottom: 14px; }
.case-header__title h3 { font-size: 34px; font-weight: 300; letter-spacing: 3px; margin-bottom: 12px; }
.case-header__title .case-meta { font-size: 14px; color: var(--gold-light); letter-spacing: 2px; }
.case-header__brief p { font-size: 14px; color: var(--muted); line-height: 1.95; }
.case-header__brief strong { color: var(--light); font-weight: 500; }

.case-stage { max-width: 1200px; margin: 0 auto 80px; }
.case-stage:last-child { margin-bottom: 0; }
.case-stage__head { margin-bottom: 28px; }
.case-stage__label { font-size: 12px; letter-spacing: 4px; color: var(--gold); text-transform: uppercase; margin-bottom: 10px; }
.case-stage__desc { font-size: 14px; color: var(--muted); line-height: 1.85; max-width: 760px; }

.case-stage__grid { display: grid; gap: 14px; }
.case-stage__grid--site { grid-template-columns: 2fr 1fr 1fr 1fr; grid-template-rows: 220px; }
.case-stage__grid--rooms { grid-template-columns: repeat(4, 1fr); grid-template-rows: 260px; }
.case-stage__grid--process { grid-template-columns: repeat(4, 1fr); grid-template-rows: 240px; }
.case-stage__grid--final { grid-template-columns: 1.4fr 1fr 1fr; grid-template-rows: 260px 260px; }
.case-stage__grid--final .case-img:nth-child(1) { grid-row: 1 / span 2; }

.case-img { position: relative; overflow: hidden; border: 1px solid rgba(175,128,97,0.15); background: rgba(0,0,0,0.3); }
.case-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.7s ease, filter 0.5s ease; filter: brightness(0.92); }
.case-img:hover img { transform: scale(1.05); filter: brightness(1); }
.case-img--caption { position: relative; }
.case-caption { position: absolute; left: 0; right: 0; bottom: 0; padding: 14px 16px; font-size: 12px; color: #fff; letter-spacing: 1.5px; background: linear-gradient(to top, rgba(0,21,34,0.88), transparent); }

.case-more { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.case-more__item { position: relative; overflow: hidden; aspect-ratio: 16/10; border: 1px solid rgba(175,128,97,0.15); }
.case-more__item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.7s ease, filter 0.5s ease; filter: brightness(0.85); }
.case-more__item:hover img { transform: scale(1.05); filter: brightness(1); }
.case-more__item p { position: absolute; left: 0; right: 0; bottom: 0; padding: 14px 16px; font-size: 13px; color: #fff; letter-spacing: 1.5px; background: linear-gradient(to top, rgba(0,21,34,0.92), transparent); margin: 0; }

/* mission 区：用 flex column 让联系信息被推到底部，使命愿景留在上方，避免拥挤 */
#mission { overflow: visible; padding: 60px 40px 50px; }
#mission .container { display: flex; flex-direction: column; min-height: calc(100vh - 110px); width: 100%; }
#mission .section-title { margin-bottom: 30px; }
#mission .mission-block { margin-bottom: 28px; }
#mission .mission-cta { margin-top: 16px; }

/* 联系信息（嵌入使命愿景屏，margin-top:auto 推到底部） */
.mission-contact { margin-top: auto; padding-top: 44px; border-top: 1px solid rgba(175,128,97,0.25); }
.mission-contact__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; max-width: 900px; margin: 0 auto; }
.mission-contact__item { text-align: center; }
.mission-contact__item .mc-label { display: block; font-size: 11px; letter-spacing: 3px; text-transform: uppercase; color: var(--gold); margin-bottom: 10px; }
.mission-contact__item .mc-value { display: block; font-size: 15px; color: var(--light); letter-spacing: 1px; transition: color 0.3s; }
.mission-contact__item .mc-value.mc-tel { font-size: 20px; color: var(--gold-light); font-weight: 500; letter-spacing: 2px; }
.mission-contact__item a.mc-value:hover { color: var(--gold); }
.mc-business { text-align: center; margin-top: 18px; font-size: 11px; color: var(--muted); letter-spacing: 2px; opacity: 0.7; }

/* 版权 + ICP（直接嵌入联系信息下方） */
.mission-copyright { margin-top: 24px; padding-top: 20px; border-top: 1px solid rgba(239,236,234,0.08); text-align: center; }
.mission-copyright .mc-logo { height: 24px; width: auto; margin: 0 auto 12px; opacity: 0.85; display: block; }
.mission-copyright p { font-size: 12px; color: rgba(239,236,234,0.5); line-height: 1.8; letter-spacing: 0.5px; }
.mission-copyright .footer-icp { margin-top: 6px; }
.mission-copyright .footer-icp a { color: rgba(239,236,234,0.5); transition: color 0.3s; }
.mission-copyright .footer-icp a:hover { color: var(--gold); }

/* WeChat Float */
.wechat-float { position: fixed; bottom: 30px; right: 30px; z-index: 999; display: flex; flex-direction: column; align-items: center; gap: 8px; cursor: pointer; }
.wechat-float .float-btn { width: 56px; height: 56px; background: #07c160; border-radius: 50%; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 15px rgba(7, 193, 96, 0.4); transition: transform 0.3s; }
.wechat-float .float-btn:hover { transform: scale(1.1); }
.wechat-float .float-btn svg { width: 28px; height: 28px; fill: #fff; }
.wechat-float .float-label { font-size: 11px; background: rgba(0, 21, 34, 0.9); color: var(--light); padding: 3px 8px; border-radius: 3px; white-space: nowrap; letter-spacing: 1px; }

/* WeChat Modal */
.wechat-modal { display: none; position: fixed; inset: 0; z-index: 2000; background: rgba(0, 0, 0, 0.7); align-items: center; justify-content: center; }
.wechat-modal.active { display: flex; }
.wechat-modal .modal-content { background: #fff; border-radius: 12px; padding: 30px; text-align: center; max-width: 320px; position: relative; }
.wechat-modal .modal-close { position: absolute; top: 10px; right: 15px; font-size: 28px; color: #999; cursor: pointer; line-height: 1; }
.wechat-modal .modal-close:hover { color: #333; }
.wechat-modal h3 { color: #001522; font-size: 18px; margin-bottom: 5px; }
.wechat-modal p { color: #666; font-size: 14px; }
.wechat-modal .qr-image { width: 220px; height: 220px; margin: 18px auto 5px; display: block; object-fit: contain; border: 1px solid #eee; border-radius: 4px; }

@media (max-width: 768px) {
  .wechat-float { bottom: 20px; right: 20px; }
  .wechat-float .float-btn { width: 48px; height: 48px; }
  .wechat-float .float-btn svg { width: 24px; height: 24px; }
}

/* Responsive */
@media (max-width: 968px) {
  .features, .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .site-header { padding: 14px 22px; }
  .site-header.scrolled { padding: 10px 22px; }
  .main-nav { display: none; position: fixed; inset: 0; background: rgba(0,21,34,0.98); flex-direction: column; justify-content: center; gap: 26px; }
  .main-nav.active { display: flex; }
  .main-nav a { font-size: 18px; }
  .hamburger { display: flex; }
  .hero-content h1 { font-size: 38px; letter-spacing: 3px; }
  .hero-content .subtitle { font-size: 16px; }
  /* 移动端取消整屏吸附 + 取消 100vh 强制，避免小屏内容挤爆 */
  html { scroll-snap-type: none; }
  .content-section { padding: 70px 22px; min-height: auto; display: block; }
  .hero-section { scroll-snap-align: none; }
  .content-section { scroll-snap-align: none; }
  .section-title h2 { font-size: 28px; }
  .lead-text { font-size: 18px; }
  .mission-block .text { font-size: 21px; }
  .partner-featured .name { font-size: 30px; }
  .features, .grid-4, .grid-3, .partner-row { grid-template-columns: 1fr; }
  .case-header { grid-template-columns: 1fr; gap: 24px; margin-bottom: 50px; }
  .case-header__title h3 { font-size: 26px; }
  .case-stage { margin-bottom: 50px; }
  .case-stage__grid--site, .case-stage__grid--rooms, .case-stage__grid--process { grid-template-columns: 1fr 1fr; grid-template-rows: 180px 180px; }
  .case-stage__grid--final { grid-template-columns: 1fr 1fr; grid-template-rows: 220px 220px 220px; }
  .case-stage__grid--final .case-img:nth-child(1) { grid-row: 1 / span 1; grid-column: 1 / span 2; }
  .case-more { grid-template-columns: 1fr 1fr; }
  .footer-top { flex-direction: column; gap: 30px; }
  .mission-contact__grid { grid-template-columns: 1fr; gap: 20px; }
  .contact-grid { grid-template-columns: 1fr; gap: 28px; }
  .page-hero__content h1 { font-size: 32px; letter-spacing: 3px; }
  .page-hero__content .subtitle { font-size: 14px; }
  .mission-headline { font-size: 28px; }
  .mission-statement .text { font-size: 20px; }
  .contact-section__title { font-size: 26px; }
  .page-main { padding: 60px 22px 50px; }
  .scroll-hint { bottom: 22px; }
  /* 移动端隐藏圆点指示器（屏幕窄，避免遮挡） */
  .section-indicator { display: none; }
}