/* =========================================================
   素履工作室 SULU STUDIO — 暖调人文风样式表
   纯 CSS，无预处理器、无外部依赖
   ========================================================= */

/* ---------- 1. 设计变量 ---------- */
:root {
  /* 纸感暖色 */
  --paper:        #FBF7F1;
  --paper-2:      #F5EFE5;
  --paper-3:      #EEE7DA;
  --ink:          #241F1B;
  --ink-2:        #5C534A;
  --ink-3:        #8C8175;

  /* 陶土点缀 */
  --accent:       #A9553B;
  --accent-soft:  #C9835E;
  --accent-wash:  #F0E3D8;

  --line:         rgba(36, 31, 27, .13);
  --line-soft:    rgba(36, 31, 27, .07);

  /* 字体 */
  --serif: "Songti SC", "STSong", "Source Han Serif SC", "Noto Serif SC",
           "SimSun", Georgia, "Times New Roman", serif;
  --sans:  "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
           -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  /* 尺度 */
  --wrap: 1160px;
  --gutter: 28px;
  --radius: 3px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

/* ---------- 2. 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.85;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.is-locked { overflow: hidden; }

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 400;
  font-family: var(--serif);
  letter-spacing: .02em;
  line-height: 1.35;
}

p  { margin: 0 0 1.1em; }
ul, ol, dl, dd { margin: 0; padding: 0; }
li { list-style: none; }
img { max-width: 100%; display: block; }

a {
  color: inherit;
  text-decoration: none;
  transition: color .3s var(--ease), opacity .3s var(--ease);
}

::selection { background: var(--accent-wash); color: var(--ink); }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ---------- 3. 纸张颗粒质感 ---------- */
.grain {
  position: fixed;
  inset: 0;
  z-index: 9999;
  pointer-events: none;
  opacity: .38;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
}

/* ---------- 4. 布局工具 ---------- */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 10000;
  background: var(--ink);
  color: var(--paper);
  padding: 10px 16px;
}
.skip-link:focus { left: 12px; top: 12px; }

/* ---------- 5. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 26px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 14px;
  letter-spacing: .06em;
  cursor: pointer;
  white-space: nowrap;
  transition: all .35s var(--ease);
  font-family: var(--sans);
}

.btn-solid {
  background: var(--ink);
  color: var(--paper);
}
.btn-solid:hover {
  background: var(--accent);
  transform: translateY(-2px);
}

.btn-line {
  border-color: var(--line);
  color: var(--ink);
}
.btn-line:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-ghost {
  border-color: var(--line);
  height: 38px;
  padding: 0 18px;
  font-size: 13px;
  color: var(--ink-2);
}
.btn-ghost:hover {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper);
}

.btn-block { width: 100%; }

/* ---------- 6. 顶部导航 ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 900;
  transition: background .4s var(--ease), box-shadow .4s var(--ease);
}

.site-header.is-scrolled {
  background: rgba(251, 247, 241, .88);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  box-shadow: 0 1px 0 var(--line-soft);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 76px;
}

.brand { display: flex; align-items: center; gap: 10px; }

.brand-mark {
  width: 22px; height: 22px;
  border: 1.5px solid var(--accent);
  border-radius: 50%;
  position: relative;
  flex: none;
  transition: transform .5s var(--ease);
}
.brand-mark::after {
  content: "";
  position: absolute;
  left: 50%; top: 3px; bottom: 3px;
  width: 1.5px;
  background: var(--accent);
  transform: translateX(-50%);
}
.brand:hover .brand-mark { transform: rotate(180deg); }

.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 400;
  letter-spacing: .12em;
}
.brand-text em {
  font-style: normal;
  font-size: 9px;
  letter-spacing: .22em;
  color: var(--ink-3);
  margin-top: 3px;
}

.nav-desktop { display: flex; gap: 32px; }
.nav-desktop a {
  font-size: 14px;
  color: var(--ink-2);
  position: relative;
  padding: 4px 0;
}
.nav-desktop a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .4s var(--ease);
}
.nav-desktop a:hover { color: var(--ink); }
.nav-desktop a:hover::after { transform: scaleX(1); }

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  position: relative;
}
.nav-toggle span {
  position: absolute;
  left: 50%; width: 16px; height: 1.5px;
  background: var(--ink);
  transform: translateX(-50%);
  transition: all .3s var(--ease);
}
.nav-toggle span:nth-child(1) { top: 17px; }
.nav-toggle span:nth-child(2) { top: 22px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { top: 19px; transform: translateX(-50%) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { top: 19px; transform: translateX(-50%) rotate(-45deg); }

/* 移动端菜单 */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 880;
  background: var(--paper);
  padding: 110px var(--gutter) 40px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  animation: fadeIn .3s var(--ease);
}
.mobile-menu[hidden] { display: none; }

.mobile-menu nav { display: flex; flex-direction: column; }
.mobile-menu nav a {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--serif);
  font-size: 26px;
}
.mobile-menu nav a i {
  font-style: normal;
  font-family: var(--sans);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: .1em;
}
.mobile-menu-foot {
  margin: 0;
  font-size: 13px;
  color: var(--ink-3);
  letter-spacing: .06em;
}

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ---------- 7. Hero ---------- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: 140px 0 90px;
}

.eyebrow {
  font-size: 12px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 34px;
}

.hero-title {
  font-size: clamp(42px, 8.2vw, 96px);
  line-height: 1.14;
  letter-spacing: .015em;
  margin-bottom: 48px;
}
.hero-title span { display: block; }
.hero-title span:nth-child(2) { padding-left: clamp(0px, 6vw, 90px); }
.hero-title em {
  font-style: normal;
  color: var(--accent);
  position: relative;
}
.hero-title em::after {
  content: "";
  position: absolute;
  left: 0; bottom: .1em;
  width: 100%; height: 2px;
  background: var(--accent-soft);
  opacity: .45;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  padding-bottom: 56px;
  border-bottom: 1px solid var(--line);
}
.hero-meta p {
  max-width: 44ch;
  color: var(--ink-2);
  font-size: 15px;
  margin: 0;
}
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }

.hero-facts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}
.hero-facts div {
  border-left: 1px solid var(--line);
  padding-left: 16px;
}
.hero-facts dt {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--ink-3);
  margin-bottom: 6px;
}
.hero-facts dd {
  font-family: var(--serif);
  font-size: 30px;
  line-height: 1;
}
.hero-facts dd sup {
  font-size: 13px;
  vertical-align: super;
  color: var(--accent);
  font-family: var(--sans);
}

.scroll-hint {
  position: absolute;
  right: var(--gutter);
  bottom: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  font-size: 10px;
  letter-spacing: .24em;
  color: var(--ink-3);
  writing-mode: vertical-rl;
}
.scroll-hint i {
  width: 1px; height: 54px;
  background: linear-gradient(var(--line), transparent);
  animation: scrollLine 2.4s var(--ease) infinite;
}
@keyframes scrollLine {
  0%   { transform: scaleY(0); transform-origin: top; }
  50%  { transform: scaleY(1); transform-origin: top; }
  51%  { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ---------- 8. 通用区块 ---------- */
.section { padding: clamp(80px, 11vw, 140px) 0; }

.sec-head { margin-bottom: clamp(44px, 6vw, 72px); }
.sec-head-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.sec-no {
  display: block;
  font-size: 12px;
  letter-spacing: .24em;
  color: var(--accent);
  margin-bottom: 14px;
}
.sec-title {
  font-size: clamp(30px, 4.6vw, 46px);
}
.sec-sub {
  margin: 6px 0 0;
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.sec-note {
  margin: 0;
  font-size: 13px;
  color: var(--ink-3);
  max-width: 34ch;
  text-align: right;
}

.lead {
  font-family: var(--serif);
  font-size: clamp(19px, 2.2vw, 24px);
  line-height: 1.7;
  color: var(--ink);
  margin-bottom: 1.2em;
}

/* ---------- 9. 关于 ---------- */
.about { background: linear-gradient(var(--paper), var(--paper-2)); }

.about-grid {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: clamp(36px, 6vw, 88px);
  align-items: start;
}

.about-text p {
  color: var(--ink-2);
  font-size: 15px;
  max-width: 52ch;
}

.about-list {
  margin: 34px 0 26px;
  border-top: 1px solid var(--line-soft);
}
.about-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
}
.about-list li span:first-child {
  font-family: var(--serif);
  font-size: 17px;
  min-width: 4em;
}
.about-list li span:last-child { color: var(--ink-3); font-size: 13px; }
.about-list .dot {
  flex: 1;
  height: 1px;
  background: var(--line-soft);
  min-width: 20px;
}

.sign {
  font-family: var(--serif);
  font-size: 15px;
  color: var(--ink-3);
  margin: 0;
}

.about-figure {
  margin: 0;
  position: relative;
  padding-top: 22px;
}
.about-figure figcaption {
  margin-top: 14px;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--ink-3);
}

.float-card {
  position: absolute;
  left: -26px;
  bottom: 48px;
  background: var(--paper);
  border: 1px solid var(--line);
  padding: 16px 22px;
  text-align: center;
  box-shadow: 0 14px 30px rgba(36, 31, 27, .06);
}
.float-card strong {
  display: block;
  font-family: var(--serif);
  font-size: 26px;
  line-height: 1.1;
  color: var(--accent);
}
.float-card span {
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--ink-3);
}

/* 占位图 */
.ph {
  position: relative;
  background-color: var(--paper-3);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.ph::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(45deg, transparent 48%, rgba(255,255,255,.5) 49%, transparent 51%);
  opacity: .35;
}
.ph-label {
  position: relative;
  font-size: 11px;
  letter-spacing: .18em;
  color: rgba(36, 31, 27, .38);
  text-align: center;
  padding: 0 16px;
}

.ph-portrait {
  aspect-ratio: 4 / 5;
  background:
    radial-gradient(120% 90% at 20% 15%, #EFE4D3 0%, transparent 60%),
    linear-gradient(150deg, #E4D6C2, #D9C6AC);
  border: 1px solid var(--line-soft);
}

/* ---------- 10. 服务 ---------- */
.svc-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.svc {
  background: var(--paper);
  padding: clamp(28px, 3.4vw, 44px);
  transition: background .45s var(--ease);
}
.svc:hover { background: var(--paper-2); }

.svc-no {
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--accent);
}
.svc h3 {
  font-size: 26px;
  margin: 18px 0 4px;
}
.svc-en {
  margin: 0 0 18px;
  font-size: 11px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.svc-desc {
  font-size: 14.5px;
  color: var(--ink-2);
  min-height: 5.5em;
  margin-bottom: 22px;
}
.svc-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.svc-tags li {
  font-size: 12px;
  color: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 12px;
}

.process {
  margin-top: clamp(48px, 6vw, 76px);
  border-top: 1px solid var(--line);
  padding-top: 34px;
}
.process h4 {
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--ink-3);
  margin-bottom: 26px;
}
.process ol {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.process li { display: flex; flex-direction: column; gap: 6px; }
.process i {
  font-style: normal;
  color: var(--accent);
  font-size: 18px;
  margin-bottom: 4px;
}
.process strong {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 400;
}
.process span { font-size: 13px; color: var(--ink-3); }

/* ---------- 11. 作品 ---------- */
.works { background: var(--paper-2); }

.work-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(24px, 3vw, 40px) clamp(20px, 2.4vw, 32px);
}

.work { display: block; }
.work-thumb {
  aspect-ratio: 4 / 3;
  border: 1px solid var(--line-soft);
  transition: transform .55s var(--ease), box-shadow .55s var(--ease);
}
.work:hover .work-thumb {
  transform: translateY(-8px);
  box-shadow: 0 22px 44px rgba(36, 31, 27, .10);
}

.work-info {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 2px 0;
}
.work-info h3 {
  font-size: 20px;
  transition: color .3s var(--ease);
}
.work:hover .work-info h3 { color: var(--accent); }
.work-info p {
  margin: 2px 0 0;
  font-size: 13px;
  color: var(--ink-3);
}
.work-year {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--ink-3);
  flex: none;
  padding-top: 4px;
}

/* 作品占位色：不同项目不同暖调 */
.ph-w1 { background: linear-gradient(140deg, #DCC9AE, #B9956F); }
.ph-w2 { background: linear-gradient(140deg, #E6D9C6, #C2A78A); }
.ph-w3 { background: linear-gradient(140deg, #D8C3A5, #A9814F); }
.ph-w4 { background: linear-gradient(140deg, #E9DCCB, #BE9C74); }
.ph-w5 { background: linear-gradient(140deg, #D3C6B4, #96836C); }
.ph-w6 { background: linear-gradient(140deg, #E3D3BA, #CBA876); }

/* ---------- 12. 随想 ---------- */
.note-list { border-top: 1px solid var(--line); }
.note-list li { border-bottom: 1px solid var(--line); }
.note-list a {
  display: grid;
  grid-template-columns: 130px 1fr auto;
  align-items: baseline;
  gap: 24px;
  padding: 26px 4px;
  position: relative;
  transition: padding .4s var(--ease);
}
.note-list a::before {
  content: "";
  position: absolute;
  left: 0; top: -1px;
  width: 100%; height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .5s var(--ease);
}
.note-list a:hover { padding-left: 18px; }
.note-list a:hover::before { transform: scaleX(1); }
.note-list a:hover h3 { color: var(--accent); }

.note-list time {
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--ink-3);
}
.note-list h3 {
  font-size: clamp(19px, 2.2vw, 25px);
  transition: color .3s var(--ease);
}
.note-list p {
  grid-column: 2;
  margin: 6px 0 0;
  font-size: 14px;
  color: var(--ink-3);
}
.note-arrow {
  grid-row: 1 / 3;
  grid-column: 3;
  align-self: center;
  font-size: 20px;
  color: var(--ink-3);
  transition: transform .4s var(--ease), color .3s var(--ease);
}
.note-list a:hover .note-arrow {
  transform: translateX(8px);
  color: var(--accent);
}

/* ---------- 13. 联系 ---------- */
.contact { background: linear-gradient(var(--paper-2), var(--paper)); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr .95fr;
  gap: clamp(36px, 6vw, 80px);
  align-items: start;
}

.contact-side .lead { max-width: 20ch; }
.contact-note {
  font-size: 14.5px;
  color: var(--ink-2);
  max-width: 44ch;
  margin-bottom: 32px;
}

.contact-info { border-top: 1px solid var(--line); }
.contact-info li {
  display: flex;
  gap: 20px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14.5px;
}
.contact-info li span:first-child {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--ink-3);
  min-width: 3em;
  padding-top: .35em;
}
.contact-info a:hover { color: var(--accent); }

.contact-status {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-top: 26px;
  font-size: 13px;
  color: var(--ink-2);
}
.dot-live {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #5B8C51;
  box-shadow: 0 0 0 4px rgba(91, 140, 81, .16);
  animation: pulse 2.6s ease-in-out infinite;
}
@keyframes pulse {
  50% { box-shadow: 0 0 0 7px rgba(91, 140, 81, .05); }
}

/* 表单 */
.contact-form {
  background: var(--paper);
  border: 1px solid var(--line);
  padding: clamp(26px, 3.4vw, 40px);
}

.field { margin-bottom: 20px; }
.field label {
  display: block;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--ink-3);
  margin-bottom: 8px;
}
.field input,
.field select,
.field textarea {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line);
  padding: 10px 2px;
  font-family: var(--sans);
  font-size: 15px;
  color: var(--ink);
  border-radius: 0;
  transition: border-color .3s var(--ease);
}
.field textarea { resize: vertical; }
.field select { appearance: none; cursor: pointer; }
.field input::placeholder,
.field textarea::placeholder { color: var(--ink-3); opacity: .8; }
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-bottom-color: var(--accent);
}

.form-tip {
  margin: 14px 0 0;
  min-height: 1.4em;
  font-size: 13px;
  color: var(--ink-3);
  text-align: center;
}
.form-tip.is-ok  { color: #5B8C51; }
.form-tip.is-err { color: var(--accent); }

/* ---------- 14. 页脚 ---------- */
.site-footer {
  background: var(--ink);
  color: rgba(251, 247, 241, .72);
  padding: clamp(56px, 7vw, 84px) 0 34px;
}

.foot-top {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 28px;
  flex-wrap: wrap;
  padding-bottom: 46px;
  border-bottom: 1px solid rgba(251, 247, 241, .16);
}

.foot-slogan {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(26px, 4.4vw, 46px);
  line-height: 1.3;
  color: var(--paper);
  letter-spacing: .04em;
}
.foot-mail {
  font-size: 15px;
  letter-spacing: .06em;
  border-bottom: 1px solid rgba(251, 247, 241, .35);
  padding-bottom: 4px;
}
.foot-mail:hover { color: var(--paper); border-color: var(--paper); }

.foot-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  padding-top: 26px;
  font-size: 12.5px;
}
.foot-bottom p { margin: 0; }
.foot-bottom nav { display: flex; gap: 24px; }
.foot-bottom nav a:hover { color: var(--paper); }

/* ---------- 15. 滚动淡入 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
}
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- 16. 响应式 ---------- */
@media (max-width: 1000px) {
  .hero-facts { grid-template-columns: repeat(2, 1fr); gap: 24px 20px; }
  .svc-grid { grid-template-columns: 1fr 1fr; }
  .process ol { grid-template-columns: 1fr 1fr; }
  .work-grid { grid-template-columns: 1fr 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .about-figure { max-width: 420px; }
  .float-card { left: auto; right: 10px; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  :root { --gutter: 20px; }
  html { scroll-padding-top: 70px; }
  body { font-size: 15px; }

  .nav-desktop, .header-cta { display: none; }
  .nav-toggle { display: block; }
  .header-inner { height: 64px; }

  .hero { padding: 110px 0 70px; min-height: auto; }
  .hero-title span:nth-child(2) { padding-left: 0; }
  .scroll-hint { display: none; }
  .hero-meta { flex-direction: column; align-items: flex-start; }

  .svc-grid { grid-template-columns: 1fr; }
  .svc-desc { min-height: 0; }
  .process ol { grid-template-columns: 1fr; gap: 18px; }

  .work-grid { grid-template-columns: 1fr; }
  .work-thumb { aspect-ratio: 3 / 2; }

  .sec-head-row { flex-direction: column; align-items: flex-start; }
  .sec-note { text-align: left; }

  .note-list a { grid-template-columns: 1fr auto; gap: 10px 16px; padding: 22px 2px; }
  .note-list time { grid-column: 1 / -1; }
  .note-list h3, .note-list p { grid-column: 1; }
  .note-list p { margin-top: 4px; }
  .note-arrow { grid-row: 2 / 4; }

  .float-card { right: 12px; bottom: 12px; padding: 12px 16px; }
}

@media (max-width: 420px) {
  .hero-facts { grid-template-columns: 1fr 1fr; }
  .hero-actions { width: 100%; }
  .hero-actions .btn { flex: 1; padding: 0 14px; }
}

/* ---------- 17. 降低动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}