/* =========================================================
   上舍 SHANG SHE · 收纳定制工作室
   设计系统 / Visual & UI System
   调性：东方极简 · 美术馆展签式排版 · 克制留白
   ========================================================= */

:root {
  /* —— 色彩体系（拒绝高饱和） —— */
  --paper:      #F7F4EE;   /* 宣纸白 · 主背景 */
  --oat:        #EAE3D6;   /* 燕麦色 */
  --oat-deep:   #DDD3C2;   /* 燕麦深 */
  --cement:     #C9C3B8;   /* 微水泥灰 */
  --walnut:     #6E5238;   /* 胡桃木色 */
  --walnut-lt:  #8C6C4B;   /* 胡桃木浅 */
  --ink:        #1C1A17;   /* 哑光黑 */
  --ink-soft:   #38332C;   /* 柔黑 · 正文 */
  --muted:      #8C8478;   /* 弱化文字 */
  --line:       rgba(28,26,23,0.12);
  --line-soft:  rgba(28,26,23,0.07);

  /* —— 字体 —— */
  --font-serif: "Noto Serif SC", "Songti SC", "Source Han Serif SC", "STSong", "SimSun", serif;
  --font-sans:  "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-latin: "Cormorant Garamond", "Optima", "Times New Roman", serif;

  /* —— 节奏 —— */
  --maxw: 1200px;
  --gap: 24px;
  --section-y: 140px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* —— Reset —— */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  background: var(--paper);
  color: var(--ink-soft);
  line-height: 1.75;
  font-size: 16px;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* —— 容器 —— */
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 40px; }
@media (max-width: 640px) { .container { padding: 0 22px; } }

/* =========================================================
   导航 Nav
   ========================================================= */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px 40px;
  transition: background .5s var(--ease), padding .5s var(--ease), box-shadow .5s var(--ease);
}
.nav.scrolled {
  background: rgba(247,244,238,0.86);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 14px 40px;
  box-shadow: 0 1px 0 var(--line-soft);
}
.brand { display: flex; align-items: baseline; gap: 10px; }
.brand .cn {
  font-family: var(--font-serif);
  font-size: 24px; font-weight: 600; letter-spacing: 0.18em;
  color: var(--ink);
}
.brand .en {
  font-family: var(--font-latin);
  font-size: 12px; letter-spacing: 0.42em; text-transform: uppercase;
  color: var(--muted);
}
.nav-links { display: flex; align-items: center; gap: 38px; }
.nav-links a {
  font-size: 14px; letter-spacing: 0.14em; color: var(--ink-soft);
  position: relative; padding: 4px 0; transition: color .3s;
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 1px; width: 0;
  background: var(--walnut); transition: width .4s var(--ease);
}
.nav-links a:hover { color: var(--walnut); }
.nav-links a:hover::after { width: 100%; }
.nav-cta {
  font-size: 13px; letter-spacing: 0.16em; color: var(--paper);
  background: var(--ink); padding: 11px 22px; border-radius: 2px;
  transition: background .3s, transform .3s var(--ease);
}
.nav-cta:hover { background: var(--walnut); transform: translateY(-1px); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.nav-toggle span { width: 24px; height: 1.5px; background: var(--ink); transition: .3s; }

@media (max-width: 900px) {
  .nav { padding: 18px 22px; }
  .nav.scrolled { padding: 14px 22px; }
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed; top: 0; right: 0; height: 100vh; width: 76%; max-width: 320px;
    background: var(--paper); flex-direction: column; align-items: flex-start;
    justify-content: center; gap: 26px; padding: 0 40px;
    transform: translateX(100%); transition: transform .5s var(--ease);
    box-shadow: -20px 0 60px rgba(28,26,23,0.08);
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { font-size: 18px; }
  .nav-cta { margin-top: 8px; }
}

/* =========================================================
   Hero
   ========================================================= */
.hero { position: relative; height: 100vh; min-height: 640px; overflow: hidden; }
.hero-img { position: absolute; inset: 0; background-size: cover; background-position: center; }
.hero::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(28,26,23,0.28) 0%, rgba(28,26,23,0.05) 38%, rgba(28,26,23,0.42) 100%);
}
.hero-inner {
  position: absolute; inset: 0; z-index: 2;
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 0 40px 96px;
}
.hero-eyebrow {
  font-family: var(--font-latin);
  font-size: 13px; letter-spacing: 0.46em; text-transform: uppercase;
  color: rgba(247,244,238,0.82); margin-bottom: 26px;
}
.hero h1 {
  font-family: var(--font-serif);
  font-weight: 500; color: var(--paper);
  font-size: clamp(34px, 5.4vw, 72px); line-height: 1.22; letter-spacing: 0.04em;
  max-width: 16em; text-shadow: 0 2px 30px rgba(28,26,23,0.25);
}
.hero-sub {
  margin-top: 22px; font-size: 15px; letter-spacing: 0.22em;
  color: rgba(247,244,238,0.9); font-family: var(--font-serif);
}
.scroll-cue {
  position: absolute; left: 50%; bottom: 30px; z-index: 3; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  color: rgba(247,244,238,0.75); font-size: 11px; letter-spacing: 0.3em;
}
.scroll-cue .line { width: 1px; height: 46px; background: rgba(247,244,238,0.5); animation: cue 2.4s var(--ease) infinite; }
@keyframes cue { 0%{transform:scaleY(0);transform-origin:top} 40%{transform:scaleY(1);transform-origin:top} 60%{transform:scaleY(1);transform-origin:bottom} 100%{transform:scaleY(0);transform-origin:bottom} }

/* =========================================================
   通用区块 / 标题
   ========================================================= */
.section { padding: var(--section-y) 0; }
.section.alt { background: var(--oat); }
.section-head { max-width: 760px; margin-bottom: 72px; }
.eyebrow {
  font-family: var(--font-latin);
  font-size: 12px; letter-spacing: 0.42em; text-transform: uppercase;
  color: var(--walnut); display: inline-block; margin-bottom: 22px;
}
.section-head h2 {
  font-family: var(--font-serif); font-weight: 500;
  font-size: clamp(28px, 3.6vw, 46px); line-height: 1.3; color: var(--ink);
  letter-spacing: 0.03em;
}
.section-head p { margin-top: 22px; color: var(--muted); font-size: 16px; max-width: 56ch; }
.divider { width: 56px; height: 1px; background: var(--walnut); margin: 0 0 30px; }

/* =========================================================
   宣言 / Manifesto
   ========================================================= */
.manifesto { padding: 120px 0; }
.manifesto p {
  font-family: var(--font-serif); font-weight: 500;
  font-size: clamp(22px, 3vw, 38px); line-height: 1.6; color: var(--ink);
  letter-spacing: 0.03em; max-width: 22em;
}
.manifesto .accent { color: var(--walnut); }
.manifesto .meta { margin-top: 40px; font-size: 14px; letter-spacing: 0.2em; color: var(--muted); }

/* =========================================================
   收纳哲学 Philosophy
   ========================================================= */
.phil-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: 80px; }
.phil-left { position: sticky; top: 120px; align-self: start; }
.phil-left h2 {
  font-family: var(--font-serif); font-weight: 500; color: var(--ink);
  font-size: clamp(28px, 3.4vw, 44px); line-height: 1.3; letter-spacing: 0.03em;
}
.phil-left p { margin-top: 26px; color: var(--muted); max-width: 34ch; }
.phil-list { display: flex; flex-direction: column; }
.phil-item {
  display: grid; grid-template-columns: 96px 1fr; gap: 30px;
  padding: 44px 0; border-top: 1px solid var(--line);
}
.phil-item:last-child { border-bottom: 1px solid var(--line); }
.phil-item .no {
  font-family: var(--font-latin); font-size: 30px; color: var(--walnut);
  line-height: 1; padding-top: 4px;
}
.phil-item h3 {
  font-family: var(--font-serif); font-weight: 500; font-size: 23px; color: var(--ink);
  letter-spacing: 0.04em; margin-bottom: 14px;
}
.phil-item p { color: var(--ink-soft); font-size: 15px; max-width: 46ch; }
@media (max-width: 820px) {
  .phil-grid { grid-template-columns: 1fr; gap: 40px; }
  .phil-left { position: static; }
}

/* =========================================================
   空间案例 Cases
   ========================================================= */
.case { display: grid; grid-template-columns: 1fr 1fr; gap: 0; margin-bottom: 130px; }
.case:last-child { margin-bottom: 0; }
.case-media { position: relative; overflow: hidden; aspect-ratio: 4/5; background: var(--oat-deep); }
.case-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 1.2s var(--ease); }
.case:hover .case-media img { transform: scale(1.04); }
.case-body { padding: 18px 0 18px 64px; display: flex; flex-direction: column; justify-content: center; }
.case:nth-child(even) { direction: rtl; }
.case:nth-child(even) .case-body { padding: 18px 64px 18px 0; direction: ltr; }
.case:nth-child(even) .case-media { direction: ltr; }
.case-no {
  font-family: var(--font-latin); font-size: 13px; letter-spacing: 0.4em;
  text-transform: uppercase; color: var(--walnut); margin-bottom: 18px;
}
.case h3 {
  font-family: var(--font-serif); font-weight: 500; font-size: clamp(24px, 2.6vw, 34px);
  color: var(--ink); letter-spacing: 0.03em; line-height: 1.3; margin-bottom: 8px;
}
.case .owner { font-size: 14px; color: var(--muted); margin-bottom: 26px; letter-spacing: 0.04em; }
.case-block { margin-bottom: 22px; }
.case-block .label {
  font-size: 12px; letter-spacing: 0.28em; text-transform: uppercase; color: var(--walnut);
  display: block; margin-bottom: 7px;
}
.case-block .txt { font-size: 15px; color: var(--ink-soft); }
.case-diagram {
  margin-top: 8px; border: 1px solid var(--line); background: var(--paper);
  padding: 18px; display: flex; align-items: center; justify-content: center;
}
.case-diagram svg { width: 100%; height: auto; }
.case-link {
  margin-top: 26px; font-size: 14px; letter-spacing: 0.16em; color: var(--ink);
  border-bottom: 1px solid var(--ink); padding-bottom: 4px; align-self: flex-start;
  transition: color .3s, border-color .3s;
}
.case-link:hover { color: var(--walnut); border-color: var(--walnut); }
@media (max-width: 820px) {
  .case { grid-template-columns: 1fr; gap: 26px; margin-bottom: 90px; }
  .case-body, .case:nth-child(even) .case-body { padding: 0; }
  .case:nth-child(even) { direction: ltr; }
}

/* =========================================================
   工艺与材质 Craft
   ========================================================= */
.craft-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.craft-card { background: var(--paper); }
.craft-media { aspect-ratio: 4/3; overflow: hidden; background: var(--oat-deep); }
.craft-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 1s var(--ease); }
.craft-card:hover .craft-media img { transform: scale(1.05); }
.craft-card .body { padding: 28px 4px 0; }
.craft-card .tag { font-family: var(--font-latin); font-size: 12px; letter-spacing: 0.34em; text-transform: uppercase; color: var(--walnut); }
.craft-card h3 { font-family: var(--font-serif); font-weight: 500; font-size: 22px; color: var(--ink); margin: 12px 0 10px; letter-spacing: 0.04em; }
.craft-card p { font-size: 14.5px; color: var(--ink-soft); }
@media (max-width: 820px) { .craft-grid { grid-template-columns: 1fr; gap: 40px; } }

/* =========================================================
   服务旅程 Process
   ========================================================= */
.journey { background: var(--ink); color: var(--paper); }
.journey .eyebrow { color: var(--cement); }
.journey .section-head h2 { color: var(--paper); }
.journey .divider { background: var(--walnut-lt); }
.journey-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: rgba(247,244,238,0.12); border: 1px solid rgba(247,244,238,0.12); }
.step { background: var(--ink); padding: 40px 34px; transition: background .4s; }
.step:hover { background: #242019; }
.step .no { font-family: var(--font-latin); font-size: 34px; color: var(--walnut-lt); line-height: 1; }
.step h4 { font-family: var(--font-serif); font-weight: 500; font-size: 20px; color: var(--paper); margin: 18px 0 10px; letter-spacing: 0.04em; }
.step p { font-size: 14px; color: rgba(247,244,238,0.66); }
.journey-note { margin-top: 46px; font-size: 14px; letter-spacing: 0.1em; color: rgba(247,244,238,0.7); display: flex; align-items: center; gap: 14px; }
.journey-note .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--walnut-lt); }
@media (max-width: 820px) { .journey-steps { grid-template-columns: 1fr; } }

/* =========================================================
   手记 Journal
   ========================================================= */
.journal-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.post { border-top: 1px solid var(--line); padding-top: 26px; transition: transform .4s var(--ease); }
.post:hover { transform: translateY(-4px); }
.post .date { font-family: var(--font-latin); font-size: 12px; letter-spacing: 0.3em; text-transform: uppercase; color: var(--walnut); }
.post h3 { font-family: var(--font-serif); font-weight: 500; font-size: 21px; color: var(--ink); margin: 14px 0 12px; line-height: 1.4; letter-spacing: 0.03em; }
.post p { font-size: 14.5px; color: var(--ink-soft); }
.post .more { display: inline-block; margin-top: 18px; font-size: 13px; letter-spacing: 0.16em; color: var(--muted); }
@media (max-width: 820px) { .journal-grid { grid-template-columns: 1fr; gap: 40px; } }

/* =========================================================
   客户评价 Testimonials
   ========================================================= */
.quote { max-width: 880px; margin: 0 auto; text-align: center; }
.quote .mark { font-family: var(--font-serif); font-size: 80px; line-height: 0.6; color: var(--oat-deep); }
.quote blockquote {
  font-family: var(--font-serif); font-weight: 500; font-size: clamp(22px, 2.6vw, 32px);
  line-height: 1.6; color: var(--ink); letter-spacing: 0.03em; margin: 20px 0 30px;
}
.quote .who { font-size: 13px; letter-spacing: 0.22em; text-transform: uppercase; color: var(--walnut); }
.quotes { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; }
.quotes .quote { text-align: left; margin: 0; }
.quotes .quote .mark { display: block; }
@media (max-width: 820px) { .quotes { grid-template-columns: 1fr; gap: 50px; } }

/* =========================================================
   预约 CTA
   ========================================================= */
.cta { background: var(--walnut); color: var(--paper); text-align: center; padding: 130px 0; }
.cta h2 { font-family: var(--font-serif); font-weight: 500; font-size: clamp(28px, 3.4vw, 46px); color: var(--paper); letter-spacing: 0.04em; line-height: 1.4; }
.cta p { margin: 26px auto 40px; max-width: 44ch; color: rgba(247,244,238,0.82); }
.btn {
  display: inline-block; font-size: 14px; letter-spacing: 0.18em;
  padding: 16px 40px; border-radius: 2px; transition: transform .3s var(--ease), background .3s, color .3s;
}
.btn-solid { background: var(--paper); color: var(--ink); }
.btn-solid:hover { transform: translateY(-2px); background: var(--oat); }
.btn-ghost { border: 1px solid rgba(247,244,238,0.5); color: var(--paper); margin-left: 14px; }
.btn-ghost:hover { background: rgba(247,244,238,0.12); }
.cta .report { display: block; margin-top: 30px; font-size: 13px; letter-spacing: 0.14em; color: rgba(247,244,238,0.7); text-decoration: underline; text-underline-offset: 5px; }
@media (max-width: 640px) { .btn-ghost { margin-left: 0; margin-top: 14px; } }

/* =========================================================
   页脚 Footer
   ========================================================= */
.footer { background: var(--ink); color: rgba(247,244,238,0.7); padding: 90px 0 40px; }
.footer-top { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 50px; padding-bottom: 60px; border-bottom: 1px solid rgba(247,244,238,0.12); }
.footer .brand .cn { color: var(--paper); }
.footer .brand .en { color: rgba(247,244,238,0.5); }
.footer-about { font-size: 14px; max-width: 36ch; margin-top: 22px; line-height: 1.8; }
.footer h5 { font-size: 12px; letter-spacing: 0.26em; text-transform: uppercase; color: rgba(247,244,238,0.5); margin-bottom: 22px; }
.footer-links a, .footer-contact li { display: block; font-size: 14px; color: rgba(247,244,238,0.78); margin-bottom: 14px; transition: color .3s; }
.footer-links a:hover { color: var(--paper); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding-top: 30px; font-size: 12.5px; letter-spacing: 0.08em; color: rgba(247,244,238,0.45); }
.footer-bottom .social { display: flex; gap: 22px; }
@media (max-width: 820px) { .footer-top { grid-template-columns: 1fr; gap: 40px; } .footer-bottom { flex-direction: column; gap: 16px; text-align: center; } }

/* =========================================================
   滚动渐显
   ========================================================= */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 1s var(--ease), transform 1s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
.reveal[data-delay="1"] { transition-delay: .12s; }
.reveal[data-delay="2"] { transition-delay: .24s; }
.reveal[data-delay="3"] { transition-delay: .36s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}