/* ============================================================
   陈名设计工作室 — Design System v2
   暖调质感配色（无纯黑）· Jost 英文/数字 · 极简动效
   ============================================================ */
:root {
  --paper: #f7f5f1;
  --paper-2: #eceae2;
  --white: #fdfcfa;
  --ink: #36322c;
  --ink-2: #4e483f;
  --gray: #7d766b;
  --line: #e4dfd5;
  --bronze: #a68c60;
  --bronze-dark: #8b7349;
  --deep: #48423a;
  --font-sans: 'Noto Sans SC', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-en: 'Jost', 'Noto Sans SC', sans-serif;
  --ease: cubic-bezier(.25, .6, .3, 1);
  --pad: clamp(20px, 5vw, 72px);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--paper);
  color: var(--ink);
  font-weight: 300;
  line-height: 1.9;
  letter-spacing: .03em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
::selection { background: var(--bronze); color: #fff; }

.wrap { max-width: 1320px; margin: 0 auto; padding-left: var(--pad); padding-right: var(--pad); }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  transition: background .4s var(--ease), box-shadow .4s var(--ease);
}
.site-header .bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 24px var(--pad);
  transition: padding .4s var(--ease);
}
.site-header.scrolled {
  background: rgba(247, 245, 241, .92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 1px 0 rgba(54, 50, 44, .06);
}
.site-header.scrolled .bar { padding-top: 14px; padding-bottom: 14px; }

.logo { display: flex; align-items: baseline; gap: 14px; z-index: 102; }
.logo .zh { font-size: 19px; font-weight: 500; letter-spacing: .3em; }
.logo .en { font-family: var(--font-en); font-size: 10.5px; font-weight: 400; letter-spacing: .3em; text-transform: uppercase; color: var(--gray); }

.main-nav { display: flex; gap: clamp(24px, 3.2vw, 48px); align-items: center; }
.main-nav a {
  font-size: 13.5px; letter-spacing: .18em; color: var(--ink-2);
  position: relative; padding: 4px 0;
}
.main-nav a::after {
  content: ''; position: absolute; left: 50%; right: 50%; bottom: -2px; height: 1px;
  background: var(--bronze); transition: left .3s var(--ease), right .3s var(--ease);
}
.main-nav a:hover::after, .main-nav a.active::after { left: 0; right: 0; }
.main-nav a.active { color: var(--ink); font-weight: 400; }
.nav-tel { font-family: var(--font-en); font-weight: 300; font-size: 14px; letter-spacing: .12em; color: var(--bronze-dark); }
.lang-switch {
  font-family: var(--font-en); font-size: 11px; font-weight: 400; letter-spacing: .2em;
  color: var(--gray); border: 1px solid var(--line); padding: 4px 12px;
  transition: color .3s var(--ease), border-color .3s var(--ease);
}
.lang-switch:hover { color: var(--ink); border-color: var(--gray); }

/* 深色页头（覆盖在 hero 上时） */
.header-on-dark:not(.scrolled) { color: #fff; }
.header-on-dark:not(.scrolled) .main-nav a,
.header-on-dark:not(.scrolled) .logo .en,
.header-on-dark:not(.scrolled) .nav-tel { color: rgba(255, 255, 255, .82); }
.header-on-dark:not(.scrolled) .main-nav a.active,
.header-on-dark:not(.scrolled) .logo .zh { color: #fff; }
.header-on-dark:not(.scrolled) .lang-switch { color: rgba(255, 255, 255, .8); border-color: rgba(255, 255, 255, .35); }
.header-on-dark:not(.scrolled) .lang-switch:hover { color: #fff; border-color: rgba(255, 255, 255, .7); }

/* 汉堡按钮 */
.burger {
  display: none; z-index: 102; background: none; border: 0; cursor: pointer;
  width: 28px; height: 20px; position: relative; color: var(--ink);
}
.burger span {
  position: absolute; left: 0; right: 0; height: 1.5px; background: currentColor;
  transition: all .3s var(--ease);
}
.burger span:nth-child(1) { top: 0; }
.burger span:nth-child(2) { top: 9px; }
.burger span:nth-child(3) { top: 18px; }
.burger.open span:nth-child(1) { top: 9px; transform: rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { top: 9px; transform: rotate(-45deg); }
.header-on-dark:not(.scrolled) .burger { color: #fff; }

/* 菜单打开时，页头浮到遮罩之上并转为白色 */
body.menu-open .site-header {
  z-index: 102; background: transparent; box-shadow: none;
  backdrop-filter: none; -webkit-backdrop-filter: none;
}
body.menu-open .site-header .logo .zh, body.menu-open .burger { color: #fff; }
body.menu-open .site-header .logo .en { color: rgba(255, 255, 255, .6); }

.mobile-nav {
  position: fixed; inset: 0; z-index: 101; background: var(--deep);
  display: flex; flex-direction: column; justify-content: center; padding: 0 var(--pad);
  opacity: 0; visibility: hidden; transition: opacity .35s var(--ease), visibility .35s;
}
.mobile-nav.open { opacity: 1; visibility: visible; }
.mobile-nav a {
  color: #f4f1ec; font-size: clamp(24px, 6.4vw, 30px); font-weight: 200; letter-spacing: .26em;
  padding: 14px 0; border-bottom: 1px solid rgba(244, 241, 236, .1);
  display: flex; justify-content: space-between; align-items: center;
}
.mobile-nav a i { font-style: normal; font-family: var(--font-en); font-size: 11px; font-weight: 400; letter-spacing: .3em; text-transform: uppercase; color: var(--bronze); }
.mobile-nav .m-contact { margin-top: 40px; color: rgba(244, 241, 236, .55); font-size: 13px; letter-spacing: .12em; border: 0; display: block; }
.mobile-nav .m-contact b { color: var(--bronze); font-weight: 300; font-size: 21px; font-family: var(--font-en); letter-spacing: .1em; }

/* ---------- Hero ---------- */
.hero { position: relative; height: 100svh; min-height: 620px; overflow: hidden; background: var(--deep); }
.hero-media { position: absolute; inset: 0; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; }
.hero::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(to bottom, rgba(52, 46, 39, .34), rgba(52, 46, 39, .1) 45%, rgba(52, 46, 39, .52));
}
.hero-inner {
  position: absolute; inset: 0; z-index: 2;
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 0 var(--pad) clamp(70px, 11vh, 120px);
  color: #fff;
  animation: heroIn 1.2s var(--ease) both;
}
@keyframes heroIn { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
.hero-kicker {
  font-family: var(--font-en); font-size: clamp(11px, 1.1vw, 12.5px); font-weight: 400;
  letter-spacing: .44em; text-transform: uppercase; color: rgba(255, 255, 255, .78);
  margin-bottom: 26px; display: flex; align-items: center; gap: 18px;
}
.hero-kicker::before { content: ''; width: 52px; height: 1px; background: var(--bronze); }
.hero h1 {
  font-size: clamp(36px, 6vw, 76px); font-weight: 200; line-height: 1.32;
  letter-spacing: .1em; margin-bottom: 28px;
}
.hero h1 b { font-weight: 500; }
.hero-sub { font-size: clamp(13px, 1.3vw, 15px); letter-spacing: .26em; color: rgba(255, 255, 255, .7); }
.hero-scroll {
  position: absolute; right: var(--pad); bottom: 40px; z-index: 3;
  color: rgba(255, 255, 255, .55); font-family: var(--font-en); font-size: 10px; font-weight: 400;
  letter-spacing: .38em; text-transform: uppercase;
  writing-mode: vertical-rl; display: flex; align-items: center; gap: 14px;
}
.hero-scroll::after { content: ''; width: 1px; height: 48px; background: rgba(255, 255, 255, .3); }

/* 内页小 hero（只设上下 padding，避免覆盖 .wrap 的左右留白） */
.page-hero { padding-top: clamp(140px, 20vh, 210px); padding-bottom: clamp(44px, 7vh, 80px); }
.page-hero .en {
  font-family: var(--font-en); font-size: clamp(11px, 1.2vw, 13px); font-weight: 400;
  letter-spacing: .44em; text-transform: uppercase; color: var(--bronze); margin-bottom: 16px;
}
.page-hero h1 { font-size: clamp(32px, 4.6vw, 52px); font-weight: 200; letter-spacing: .14em; }
.page-hero p { margin-top: 18px; color: var(--gray); max-width: 620px; font-size: 15px; }

/* ---------- 通用 section ---------- */
section { padding: clamp(72px, 10vw, 130px) 0; }
.sec-head { margin-bottom: clamp(40px, 5.5vw, 70px); }
.sec-label {
  display: flex; align-items: center; gap: 16px;
  font-family: var(--font-en); font-size: 11.5px; font-weight: 400; letter-spacing: .44em;
  text-transform: uppercase; color: var(--bronze); margin-bottom: 18px;
}
.sec-label::before { content: ''; width: 42px; height: 1px; background: var(--bronze); }
.sec-title { font-size: clamp(25px, 3.3vw, 40px); font-weight: 200; letter-spacing: .1em; line-height: 1.55; }
.sec-title b { font-weight: 500; }
.sec-desc { margin-top: 20px; color: var(--gray); max-width: 600px; font-size: 15px; }

/* 滚动显现（轻量：小位移、短时长、无长阶梯） */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s var(--ease), transform .6s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal-d1 { transition-delay: .08s; }
.reveal-d2 { transition-delay: .16s; }
.reveal-d3 { transition-delay: .24s; }

/* ---------- 数据带 ---------- */
.stats { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); padding: 0; background: var(--white); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stat {
  padding: clamp(36px, 4.6vw, 58px) clamp(16px, 2.5vw, 40px);
  border-left: 1px solid var(--line); text-align: left;
}
.stat:first-child { border-left: 0; }
.stat .num {
  font-family: var(--font-en); font-size: clamp(32px, 4.2vw, 54px); font-weight: 200;
  line-height: 1.1; color: var(--ink); letter-spacing: .04em;
}
.stat .num i { font-style: normal; font-family: var(--font-sans); font-size: .42em; font-weight: 300; color: var(--bronze-dark); margin-left: 8px; letter-spacing: .1em; }
.stat .cap { margin-top: 10px; font-size: 13px; letter-spacing: .16em; color: var(--gray); }

/* ---------- 案例 ---------- */
.cases-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: clamp(20px, 2.8vw, 44px) clamp(16px, 2vw, 32px); }
.case-card { grid-column: span 4; }
.case-card.wide { grid-column: span 8; }
.case-card .ph { position: relative; overflow: hidden; background: var(--paper-2); }
.case-card .ph::before { content: ''; display: block; padding-top: 72%; }
.case-card.wide .ph::before { padding-top: 56.5%; }
.case-card .ph img {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
  transition: transform .8s var(--ease);
}
.case-card:hover .ph img { transform: scale(1.03); }
.case-card .ph .veil {
  position: absolute; inset: 0; background: rgba(52, 46, 39, 0);
  transition: background .4s var(--ease); display: flex; align-items: flex-end; padding: 22px;
}
.case-card:hover .ph .veil { background: rgba(52, 46, 39, .22); }
.case-card .ph .view {
  color: #fff; font-family: var(--font-en); font-size: 11px; font-weight: 400;
  letter-spacing: .34em; text-transform: uppercase;
  opacity: 0; transition: opacity .4s var(--ease);
  display: flex; align-items: center; gap: 10px;
}
.case-card .ph .view::after { content: '→'; }
.case-card:hover .ph .view { opacity: 1; }
.case-card .meta { padding: 16px 2px 0; display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.case-card .meta h3 { font-size: 16.5px; font-weight: 400; letter-spacing: .14em; }
.case-card .meta .sub { font-size: 12px; color: var(--gray); letter-spacing: .1em; white-space: nowrap; }
.case-card .tagline { font-size: 12.5px; color: var(--gray); letter-spacing: .08em; padding: 3px 2px 0; }

/* 案例筛选 */
.filter-bar { display: flex; gap: clamp(18px, 3vw, 40px); flex-wrap: wrap; margin-bottom: clamp(34px, 5vw, 56px); border-bottom: 1px solid var(--line); }
.filter-bar button {
  background: none; border: 0; cursor: pointer; font-family: var(--font-sans);
  font-size: 14px; letter-spacing: .16em; color: var(--gray); padding: 10px 2px 15px; position: relative;
}
.filter-bar button::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: -1px; height: 1px;
  background: var(--ink); transform: scaleX(0); transition: transform .3s var(--ease);
}
.filter-bar button.active { color: var(--ink); font-weight: 400; }
.filter-bar button.active::after { transform: none; }

.more-link {
  display: inline-flex; align-items: center; gap: 14px; margin-top: clamp(36px, 5vw, 56px);
  font-size: 13px; letter-spacing: .24em; color: var(--ink);
  border: 1px solid var(--ink-2); padding: 14px 34px; transition: background .3s var(--ease), color .3s var(--ease);
}
.more-link:hover { background: var(--deep); border-color: var(--deep); color: var(--paper); }

/* ---------- 理念（暖灰浅色带） ---------- */
.philosophy { background: var(--paper-2); position: relative; overflow: hidden; }
.philosophy .bigmark {
  position: absolute; right: -20px; top: 10px; font-family: var(--font-sans); font-weight: 200;
  font-size: clamp(150px, 24vw, 340px); line-height: 1; color: rgba(54, 50, 44, .04);
  pointer-events: none; user-select: none;
}
.phi-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(28px, 4vw, 60px); margin-top: clamp(40px, 5.5vw, 70px); }
.phi-item { border-top: 1px solid rgba(54, 50, 44, .16); padding-top: 26px; }
.phi-item .no { font-family: var(--font-en); color: var(--bronze-dark); font-size: 13px; font-weight: 400; letter-spacing: .26em; }
.phi-item h3 { font-size: 19px; font-weight: 500; letter-spacing: .16em; margin: 14px 0 12px; }
.phi-item p { font-size: 14px; color: var(--gray); }

/* ---------- 服务模式对比 ---------- */
.mode-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(16px, 2vw, 26px); align-items: stretch; }
.mode-card { border: 1px solid var(--line); padding: clamp(28px, 3.2vw, 46px) clamp(22px, 2.6vw, 38px); background: var(--white); display: flex; flex-direction: column; }
.mode-card .tag { font-family: var(--font-en); font-size: 11px; font-weight: 400; letter-spacing: .34em; text-transform: uppercase; color: var(--gray); }
.mode-card h3 { font-size: 20px; font-weight: 500; letter-spacing: .14em; margin: 14px 0 6px; }
.mode-card .for { font-size: 12.5px; color: var(--bronze-dark); letter-spacing: .1em; margin-bottom: 20px; }
.mode-card ul { list-style: none; flex: 1; }
.mode-card li { font-size: 14px; color: var(--ink-2); padding: 11px 0 11px 24px; border-top: 1px solid var(--line); position: relative; }
.mode-card li::before { content: '—'; position: absolute; left: 0; color: var(--bronze); }
.mode-card.hl { background: var(--deep); border-color: var(--deep); color: #efece6; box-shadow: 0 24px 48px -28px rgba(72, 66, 58, .5); }
.mode-card.hl h3 { color: #fff; }
.mode-card.hl .tag { color: var(--bronze); }
.mode-card.hl .for { color: var(--bronze); }
.mode-card.hl li { color: rgba(239, 236, 230, .8); border-color: rgba(239, 236, 230, .14); }

/* ---------- 关于 ---------- */
.about-grid { display: grid; grid-template-columns: 5fr 6fr; gap: clamp(36px, 6vw, 96px); align-items: center; }
.about-media { position: relative; }
.about-media::before {
  content: ''; position: absolute; inset: 24px -24px -24px 24px;
  border: 1px solid var(--line); z-index: 0;
}
.about-media img { position: relative; z-index: 1; aspect-ratio: 4/5; object-fit: cover; width: 100%; }
.about-copy .lead { font-size: clamp(19px, 2.1vw, 24px); font-weight: 300; line-height: 2; letter-spacing: .08em; margin-bottom: 24px; }
.about-copy p { color: var(--gray); font-size: 15px; margin-bottom: 18px; }
.sig { margin-top: 32px; display: flex; align-items: baseline; gap: 18px; }
.sig .name { font-size: 25px; font-weight: 500; letter-spacing: .26em; }
.sig .en { font-family: var(--font-en); color: var(--gray); font-size: 12.5px; font-weight: 400; letter-spacing: .16em; }

/* 时间线/流程 */
.flow { counter-reset: step; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.flow .step { background: var(--white); padding: clamp(26px, 3vw, 42px) clamp(20px, 2.4vw, 34px); counter-increment: step; }
.flow .step::before {
  content: '0' counter(step); font-family: var(--font-en); font-size: 14px; font-weight: 400;
  color: var(--bronze-dark); letter-spacing: .2em; display: block; margin-bottom: 14px;
}
.flow .step h4 { font-size: 16px; font-weight: 500; letter-spacing: .16em; margin-bottom: 10px; }
.flow .step p { font-size: 13px; color: var(--gray); }

/* ---------- CTA ---------- */
.cta { background: var(--white); border-top: 1px solid var(--line); text-align: center; }
.cta h2 { font-size: clamp(25px, 3.6vw, 42px); font-weight: 200; letter-spacing: .16em; line-height: 1.7; }
.cta h2 b { font-weight: 500; }
.cta p { color: var(--gray); margin: 18px auto 36px; max-width: 560px; font-size: 15px; }
.cta .more-link { margin-top: 0; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--deep); color: rgba(240, 237, 231, .62); padding: clamp(56px, 7.5vw, 90px) 0 32px; font-size: 13.5px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: clamp(30px, 4vw, 60px); padding-bottom: clamp(40px, 5.5vw, 64px); border-bottom: 1px solid rgba(240, 237, 231, .12); }
.site-footer .f-logo .zh { color: #fff; font-size: 21px; letter-spacing: .3em; font-weight: 400; }
.site-footer .f-logo .en { font-family: var(--font-en); font-size: 10.5px; font-weight: 400; letter-spacing: .3em; text-transform: uppercase; color: var(--bronze); margin-top: 8px; }
.site-footer .f-slogan { margin-top: 20px; max-width: 320px; line-height: 2.1; letter-spacing: .1em; }
.site-footer h5 { color: #fff; font-weight: 400; font-size: 13px; letter-spacing: .26em; margin-bottom: 18px; }
.site-footer ul { list-style: none; }
.site-footer li { margin-bottom: 11px; letter-spacing: .08em; }
.site-footer a:hover { color: #fff; }
.f-contact b { display: block; color: var(--bronze); font-family: var(--font-en); font-size: 22px; font-weight: 300; letter-spacing: .1em; margin-bottom: 6px; }
.copyright { padding-top: 28px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-family: var(--font-en); font-size: 11.5px; font-weight: 300; color: rgba(240, 237, 231, .38); letter-spacing: .1em; }

/* ---------- 案例详情 ---------- */
.case-hero { position: relative; height: 72svh; min-height: 440px; background: var(--deep); overflow: hidden; }
.case-hero img { width: 100%; height: 100%; object-fit: cover; }
.case-hero::after { content: ''; position: absolute; inset: 0; background: linear-gradient(to bottom, rgba(52,46,39,.32), transparent 40%, rgba(52,46,39,.3)); }
.case-head { padding: clamp(40px, 5.5vw, 68px) 0 0; }
.case-head h1 { font-size: clamp(29px, 4.2vw, 48px); font-weight: 200; letter-spacing: .16em; }
.case-attrs { display: flex; flex-wrap: wrap; gap: clamp(24px, 4vw, 60px); margin-top: 28px; padding: 24px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.case-attrs .attr .k { font-family: var(--font-en); font-size: 10.5px; font-weight: 400; letter-spacing: .3em; text-transform: uppercase; color: var(--bronze-dark); margin-bottom: 6px; }
.case-attrs .attr .v { font-size: 15px; letter-spacing: .1em; }
.case-body { max-width: 800px; margin: clamp(36px, 5vw, 52px) 0; color: var(--ink-2); font-size: 15.5px; }
.case-gallery { display: grid; gap: clamp(18px, 2.6vw, 36px); padding-bottom: clamp(60px, 8.5vw, 100px); }
.case-gallery img { width: 100%; }
.case-nav { display: flex; justify-content: space-between; padding: 30px 0 clamp(70px, 8.5vw, 100px); }

/* ---------- 联系页 ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(36px, 6vw, 84px); align-items: start; }
.c-item { border-top: 1px solid var(--line); padding: 22px 0; display: grid; grid-template-columns: 120px 1fr; gap: 16px; }
.c-item .k { font-size: 12px; letter-spacing: .24em; color: var(--gray); padding-top: 4px; }
.c-item .v { font-size: 16.5px; letter-spacing: .08em; }
.c-item .v.big { font-family: var(--font-en); font-size: 27px; font-weight: 300; color: var(--bronze-dark); letter-spacing: .08em; }
.c-item .v small { display: block; color: var(--gray); font-size: 12.5px; margin-top: 4px; letter-spacing: .1em; }
.contact-media img { aspect-ratio: 4/5; object-fit: cover; width: 100%; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .case-card, .case-card.wide { grid-column: span 6; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3) { border-left: 0; }
  .stat { border-top: 1px solid var(--line); }
  .stat:nth-child(-n+2) { border-top: 0; }
  .phi-grid { grid-template-columns: 1fr; gap: 32px; }
  .mode-grid { grid-template-columns: 1fr; }
  .flow { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .about-media { max-width: 520px; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 860px) {
  .main-nav { display: none; }
  .burger { display: block; }
}
@media (max-width: 640px) {
  body { letter-spacing: .02em; }
  .hero h1 { font-size: 30px; letter-spacing: .08em; }
  .hero-sub { letter-spacing: .16em; }
  .case-card, .case-card.wide { grid-column: span 12; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .flow { grid-template-columns: 1fr; }
  .c-item { grid-template-columns: 1fr; gap: 4px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > :first-child { grid-column: 1 / -1; }
  .hero-scroll { display: none; }
}

/* ---------- 英文版排版微调（拉丁字母字距收窄） ---------- */
body.en { letter-spacing: .015em; }
body.en .hero h1, body.en .sec-title, body.en .page-hero h1,
body.en .cta h2, body.en .case-head h1 { font-family: var(--font-en); font-weight: 300; }
body.en .hero h1 b, body.en .sec-title b, body.en .cta h2 b { font-weight: 500; }
body.en .hero h1 { letter-spacing: .02em; line-height: 1.22; }
body.en .hero-sub { letter-spacing: .14em; }
body.en .sec-title, body.en .page-hero h1, body.en .cta h2, body.en .case-head h1 { letter-spacing: .025em; }
body.en .main-nav a { letter-spacing: .1em; }
body.en .logo .zh { letter-spacing: .2em; }
body.en .mobile-nav a { letter-spacing: .1em; font-weight: 300; }
body.en .case-card .meta h3, body.en .phi-item h3, body.en .mode-card h3,
body.en .flow .step h4, body.en .sig .name { letter-spacing: .04em; }
body.en .stat .num i { font-family: var(--font-en); letter-spacing: .06em; }
body.en .stat .cap, body.en .filter-bar button, body.en .more-link,
body.en .site-footer h5, body.en .c-item .k { letter-spacing: .08em; }
@media (max-width: 640px) {
  body.en .hero h1 { font-size: 32px; }
}

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .hero-inner { animation: none; }
}