/* ————————————————————————————————
   智壤网络官网 · 年轻扁平风
   橙黄撞色 / 粗描边 / 硬投影 / 大黑体
———————————————————————————————— */

:root {
  --bg: #fffaf0;
  --surface: #fffdf7;
  --white: #ffffff;
  --ink: #1f1c17;
  --soft: #57534a;
  --muted: #6b6459;
  --orange: #f05a00;
  --orange-deep: #d94e00;
  --yellow: #ffc824;
  --yellow-bright: #ffd84d;
  --yellow-soft: #ffefc2;
  --peach: #ffe0cc;
  --wechat: #2aae67;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --shadow: 4px 4px 0 var(--ink);
  --shadow-lg: 7px 7px 0 var(--ink);
  --header-height: 72px;
  --shell: 1180px;
  color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-height) + 16px); }
body {
  margin: 0;
  min-width: 320px;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
body.menu-open { overflow: hidden; }

a { color: inherit; text-decoration: none; }
button, a { -webkit-tap-highlight-color: transparent; }
button { font: inherit; }
img, svg { display: block; }
h1, h2, h3, p, dl, dd, ul, ol { margin: 0; }
h1, h2 { text-wrap: balance; }
::selection { background: var(--yellow); color: var(--ink); }
:focus-visible { outline: 3px solid var(--orange); outline-offset: 3px; }
.process-section :focus-visible, .site-footer :focus-visible { outline-color: var(--yellow); }
.final-cta :focus-visible, .industries-section :focus-visible { outline-color: var(--ink); }

.skip-link { position: fixed; z-index: 3000; top: 10px; left: 10px; padding: 10px 14px; background: var(--white); border: 2px solid var(--ink); border-radius: 8px; transform: translateY(-200%); }
.skip-link:focus { transform: translateY(0); }
.section-shell { width: min(var(--shell), 100% - 48px); margin-inline: auto; }

/* ———— 高亮马克笔 ———— */
.mark { background: linear-gradient(transparent 58%, var(--yellow) 58%, var(--yellow) 94%, transparent 94%); padding-inline: 2px; }

/* ———— 徽标 ———— */
.brand-mark {
  width: 42px; height: 42px; flex: none;
  display: grid; place-items: center;
  background: var(--white);
  border: 2px solid var(--ink); border-radius: 12px;
}
.brand-mark svg { width: 30px; height: 30px; }

/* ———— 顶栏 ———— */
.site-header {
  position: fixed; z-index: 100; top: 0; left: 0; width: 100%;
  height: var(--header-height);
  background: rgba(255, 250, 240, .94);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  border-bottom: 2px solid var(--ink);
}
.nav-shell { width: min(var(--shell), 100% - 48px); height: 100%; margin-inline: auto; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-copy { display: flex; flex-direction: column; line-height: 1; }
.brand-copy b { font-size: 19px; font-weight: 800; }
.brand-copy small { margin-top: 6px; color: var(--muted); font-size: 10px; letter-spacing: 3px; }
.desktop-nav { height: 100%; display: flex; align-items: center; gap: 32px; }
.desktop-nav a { position: relative; height: 100%; display: grid; place-items: center; color: var(--soft); font-size: 15px; font-weight: 600; transition: color .2s; }
.desktop-nav a::after { content: ""; position: absolute; bottom: 14px; left: 50%; width: 0; height: 4px; border-radius: 4px; background: var(--orange); transform: translateX(-50%); transition: width .25s ease; }
.desktop-nav a:hover, .desktop-nav a.active { color: var(--ink); }
.desktop-nav a:hover::after, .desktop-nav a.active::after { width: 26px; }
.nav-actions { display: flex; align-items: center; gap: 18px; }
.text-link { color: var(--soft); font-size: 14px; font-weight: 600; }
.text-link:hover { color: var(--ink); }

/* ———— 按钮 ———— */
.button {
  min-height: 48px; padding: 0 24px;
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  border: 2px solid var(--ink); border-radius: 12px;
  font-weight: 700; font-size: 15px;
  box-shadow: var(--shadow);
  transition: transform .15s ease, box-shadow .15s ease, background .2s ease;
  cursor: pointer;
}
.button svg { width: 15px; height: 15px; }
.button:hover { transform: translate(-2px, -2px); box-shadow: 6px 6px 0 var(--ink); }
.button:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 var(--ink); }
.button-primary { color: var(--ink); background: var(--orange); }
.button-primary:hover { background: var(--yellow); }
.button-small { min-height: 40px; padding-inline: 16px; font-size: 14px; border-radius: 10px; box-shadow: 3px 3px 0 var(--ink); }
.button-small:hover { box-shadow: 5px 5px 0 var(--ink); }
.button-secondary { color: var(--ink); background: var(--white); }
.button-secondary:hover { background: var(--yellow-soft); }
.button-yellow { color: var(--ink); background: var(--yellow); box-shadow: 4px 4px 0 rgba(255, 216, 77, .35); }
.button-yellow:hover { background: var(--yellow-bright); box-shadow: 6px 6px 0 rgba(255, 216, 77, .35); }
.button-dark { color: var(--yellow); background: var(--ink); }
.button-dark:hover { color: var(--ink); background: var(--yellow); }
.button-ghost-dark { color: var(--ink); background: transparent; box-shadow: none; }
.button-ghost-dark:hover { background: rgba(255, 255, 255, .35); box-shadow: none; transform: none; }

.text-arrow { display: inline-flex; align-items: center; gap: 7px; color: var(--orange); font-size: 15px; font-weight: 700; }
.text-arrow::after { content: "→"; transition: transform .2s ease; }
.text-arrow:hover::after { transform: translateX(4px); }
.text-arrow.light { color: var(--yellow); }

/* ———— 小徽章 ———— */
.badge {
  display: inline-flex; align-items: center;
  padding: 7px 14px;
  border: 2px solid var(--ink); border-radius: 999px;
  font-size: 12.5px; font-weight: 700; letter-spacing: .08em;
}
.badge-yellow { background: var(--yellow); color: var(--ink); }
.badge-row { margin: 0 0 22px; }

/* ———— 首屏 ———— -*/
.hero { padding: calc(var(--header-height) + 64px) 0 84px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); gap: clamp(40px, 5vw, 72px); align-items: center; }
.hero h1 { font-size: clamp(38px, 4.6vw, 58px); font-weight: 900; line-height: 1.28; letter-spacing: .005em; }
.hero-lead { max-width: 500px; margin-top: 24px; color: var(--soft); font-size: 17px; line-height: 1.95; }
.hero-actions { margin-top: 34px; display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.hero-chips { margin: 40px 0 0; padding: 0; list-style: none; display: flex; gap: 10px; flex-wrap: wrap; }
.hero-chips li { display: inline-flex; align-items: center; gap: 8px; padding: 8px 15px; background: var(--white); border: 2px solid var(--ink); border-radius: 999px; font-size: 13px; font-weight: 700; }
.hero-chips li::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--orange); }
.hero-chips li:nth-child(2)::before { background: var(--yellow); }
.hero-chips li:nth-child(3)::before { background: var(--wechat); }
.hero-chips li:nth-child(4)::before { background: var(--ink); }
.hero-art svg { width: min(100%, 520px); height: auto; margin-inline: auto; }

/* 首屏入场 */
.js .hero-copy > * { opacity: 0; animation: pop .7s cubic-bezier(.22, .61, .25, 1) both; }
.js .hero-copy .badge-row { animation-delay: .05s; }
.js .hero-copy h1 { animation-delay: .12s; }
.js .hero-copy .hero-lead { animation-delay: .22s; }
.js .hero-copy .hero-actions { animation-delay: .32s; }
.js .hero-copy .hero-chips { animation-delay: .42s; }
.js .hero-art { opacity: 0; animation: pop .8s cubic-bezier(.22, .61, .25, 1) .25s both; }
@keyframes pop { from { opacity: 0; transform: translateY(20px) scale(.985); } to { opacity: 1; transform: translateY(0) scale(1); } }

/* 插画浮动 */
.art-bob { animation: bob 3.2s ease-in-out infinite alternate; }
.art-bob-late { animation-duration: 2.6s; animation-delay: .6s; }
.art-float { animation: bob 2.8s ease-in-out .3s infinite alternate; }
@keyframes bob { from { transform: translateY(0); } to { transform: translateY(-10px); } }

/* ———— 通用段落 ———— */
.section { padding: 104px 0; }
.section-heading { max-width: 640px; margin-bottom: 48px; }
.section-heading .badge { margin-bottom: 20px; }
.section-heading h2 { font-size: clamp(28px, 3.2vw, 40px); font-weight: 900; line-height: 1.4; }
.section-heading > p:last-child { margin-top: 16px; color: var(--muted); font-size: 15.5px; line-height: 1.9; }
.section-heading.light h2 { color: var(--surface); }
.section-heading.light > p:last-child { color: rgba(255, 250, 240, .66); }

/* ———— 卡片 ———— */
.card {
  border: 2px solid var(--ink); border-radius: 16px;
  background: var(--white);
  box-shadow: var(--shadow);
  transition: transform .18s ease, box-shadow .18s ease;
}
.card:hover { transform: translate(-3px, -3px); box-shadow: var(--shadow-lg); }

/* ———— 服务范围 ———— */
.services-section { background: var(--surface); border-top: 2px solid var(--ink); }
.service-featured-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.service-featured-grid .card { padding: 34px 34px 30px; }
.card-orange { background: var(--orange); }
.card-yellow { background: var(--yellow); }
.card-orange .card-icon, .card-yellow .card-icon { width: 52px; height: 52px; margin-bottom: 22px; display: grid; place-items: center; background: var(--white); border: 2px solid var(--ink); border-radius: 14px; }
.card-icon svg { width: 26px; height: 26px; color: var(--ink); }
.service-featured-grid h3 { font-size: 23px; font-weight: 800; }
.service-featured-grid p { margin-top: 12px; font-size: 14.5px; line-height: 1.9; color: rgba(31, 28, 23, .82); }
.card-link { display: inline-flex; align-items: center; gap: 7px; margin-top: 20px; font-size: 14.5px; font-weight: 800; color: var(--ink); }
.card-link svg { width: 14px; height: 14px; transition: transform .2s ease; }
.card-link:hover svg { transform: translateX(4px); }

.service-grid { margin-top: 20px; display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card-small { padding: 26px 26px 24px; }
.icon-chip { width: 46px; height: 46px; margin-bottom: 18px; display: grid; place-items: center; background: var(--yellow-soft); border: 2px solid var(--ink); border-radius: 12px; }
.icon-chip svg { width: 24px; height: 24px; }
.card-small h3 { font-size: 17.5px; font-weight: 800; }
.card-small p { margin-top: 10px; color: var(--muted); font-size: 14px; line-height: 1.85; }
.card-small .card-link { margin-top: 14px; color: var(--orange); }

/* ———— 行业场景 ———— */
.industries-section { padding: 72px 0; background: var(--yellow-bright); border-top: 2px solid var(--ink); }
.industries-inner h2 { font-size: clamp(24px, 2.6vw, 32px); font-weight: 900; }
.industries-inner .mark { background: linear-gradient(transparent 58%, var(--white) 58%, var(--white) 94%, transparent 94%); }
.pill-cloud { margin: 28px 0 0; padding: 0; list-style: none; display: flex; gap: 12px; flex-wrap: wrap; }
.pill-cloud li { padding: 10px 18px; background: var(--white); border: 2px solid var(--ink); border-radius: 999px; font-size: 14px; font-weight: 700; }
.pill-cta { background: var(--ink) !important; padding: 0 !important; }
.pill-cta a { display: inline-flex; padding: 10px 18px; color: var(--yellow); }

/* ———— 办理流程 ———— */
.process-section { color: var(--surface); background: var(--ink); border-top: 2px solid var(--ink); }
.process-list { padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; list-style: none; counter-reset: step; }
.process-list li { position: relative; }
.step-num {
  position: relative; z-index: 1;
  width: 58px; height: 58px;
  display: grid; place-items: center;
  background: var(--yellow); color: var(--ink);
  border: 2px solid var(--ink); border-radius: 50%;
  font-size: 19px; font-weight: 800;
  box-shadow: 3px 3px 0 rgba(255, 216, 77, .3);
}
.process-list li:not(:last-child)::before { content: ""; position: absolute; top: 28px; left: 74px; right: -14px; border-top: 2px dashed rgba(255, 250, 240, .3); }
.process-list h3 { margin-top: 22px; font-size: 19.5px; font-weight: 800; }
.process-list li > p { margin-top: 10px; color: rgba(255, 250, 240, .62); font-size: 14px; line-height: 1.85; }
.process-action { margin-top: 52px; display: flex; align-items: center; gap: 28px; flex-wrap: wrap; }

/* ———— 主体方案 ———— */
.solutions-section { background: var(--bg); border-top: 2px solid var(--ink); }
.solution-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.solution-card { padding: 32px 32px 30px; }
.solution-emoji { width: 54px; height: 54px; display: grid; place-items: center; background: var(--peach); border: 2px solid var(--ink); border-radius: 14px; }
.solution-emoji svg { width: 28px; height: 28px; }
.solution-card h3 { margin-top: 20px; font-size: 21px; font-weight: 800; }
.solution-card > p { margin-top: 10px; color: var(--muted); font-size: 14.5px; line-height: 1.85; }
.solution-card ul { margin: 20px 0 26px; padding: 0; list-style: none; display: grid; gap: 11px; }
.solution-card ul li { display: flex; align-items: flex-start; gap: 9px; color: var(--soft); font-size: 14.5px; line-height: 1.7; }
.solution-card ul li::before { content: "✓"; flex: none; color: var(--orange); font-weight: 900; }
.solution-note { margin-top: 36px; color: var(--muted); font-size: 13.5px; }
.solution-note::before { content: "※ "; color: var(--orange); }

/* ———— 关于我们 · 企业文化 ———— */
.about-section { background: var(--surface); border-top: 2px solid var(--ink); }
.about-grid { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(40px, 5vw, 72px); align-items: start; }
.about-intro .badge { margin-bottom: 20px; }
.about-intro h2 { font-size: clamp(28px, 3.2vw, 40px); font-weight: 900; line-height: 1.4; }
.about-intro > p { margin-top: 18px; max-width: 560px; color: var(--soft); font-size: 15.5px; line-height: 2; }
.about-info { margin-top: 32px; border: 2px solid var(--ink); border-radius: 16px; background: var(--white); box-shadow: var(--shadow); overflow: hidden; }
.about-info > div { display: flex; gap: 20px; padding: 16px 22px; font-size: 14.5px; line-height: 1.7; }
.about-info > div + div { border-top: 2px solid var(--ink); }
.about-info b { flex: none; width: 68px; color: var(--muted); font-weight: 700; }
.about-info a { color: var(--orange); font-weight: 700; }
.about-info a:hover { text-decoration: underline; }
.about-mv { display: grid; gap: 20px; }
.mv-tile { padding: 30px 30px 26px; border: 2px solid var(--ink); border-radius: 16px; box-shadow: var(--shadow); }
.mv-tile b { display: inline-block; padding: 5px 12px; background: var(--white); border: 2px solid var(--ink); border-radius: 999px; font-size: 12.5px; letter-spacing: .1em; }
.mv-tile p { margin-top: 16px; font-size: 21px; font-weight: 800; line-height: 1.6; }
.mv-mission { background: var(--orange); }
.mv-vision { background: var(--yellow); }

.values-grid { margin-top: 56px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.value-item { padding: 24px 24px 22px; background: var(--white); border: 2px solid var(--ink); border-radius: 14px; box-shadow: var(--shadow); }
.value-item b { display: flex; align-items: center; gap: 9px; font-size: 16.5px; font-weight: 800; }
.value-item b::before { content: ""; width: 10px; height: 10px; border-radius: 3px; background: var(--orange); }
.value-item:nth-child(2n) b::before { background: var(--yellow); }
.value-item p { margin-top: 12px; color: var(--muted); font-size: 13.5px; line-height: 1.85; }

/* ———— 常见问题 ———— */
.faq-section { background: var(--bg); border-top: 2px solid var(--ink); }
.faq-layout { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(40px, 5vw, 88px); align-items: start; }
.faq-intro { position: sticky; top: calc(var(--header-height) + 40px); }
.faq-intro .badge { margin-bottom: 20px; }
.faq-intro h2 { font-size: clamp(26px, 3vw, 36px); font-weight: 900; line-height: 1.45; }
.faq-intro > p { margin-top: 16px; color: var(--muted); font-size: 15px; line-height: 1.9; }
.faq-intro .text-arrow { margin-top: 26px; }
.faq-list { display: grid; gap: 14px; }
.faq-list details { border: 2px solid var(--ink); border-radius: 14px; background: var(--white); box-shadow: var(--shadow); overflow: hidden; transition: background .2s ease; }
.faq-list details[open] { background: var(--yellow-soft); }
.faq-list summary { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 19px 22px; cursor: pointer; list-style: none; font-size: 16.5px; font-weight: 800; }
.faq-list summary::-webkit-details-marker { display: none; }
.plus { position: relative; width: 16px; height: 16px; flex: none; }
.plus::before, .plus::after { content: ""; position: absolute; background: var(--orange); border-radius: 2px; transition: transform .3s ease; }
.plus::before { left: 0; top: 6.75px; width: 16px; height: 2.5px; }
.plus::after { left: 6.75px; top: 0; width: 2.5px; height: 16px; }
.faq-list details[open] .plus::before { transform: rotate(45deg); }
.faq-list details[open] .plus::after { transform: rotate(45deg); }
.faq-list details p { padding: 0 46px 20px 22px; color: var(--soft); font-size: 14.5px; line-height: 1.95; }

/* ———— 结尾 CTA ———— */
.final-cta { padding: 108px 0; background: var(--orange); border-top: 2px solid var(--ink); }
.final-inner { display: flex; flex-direction: column; align-items: center; text-align: center; }
.final-cta h2 { font-size: clamp(30px, 3.8vw, 46px); font-weight: 900; line-height: 1.45; }
.final-actions { margin-top: 38px; display: flex; gap: 14px; flex-wrap: wrap; justify-content: center; }

/* ———— 页脚 ———— */
.site-footer { padding: 68px 0 0; color: var(--bg); background: var(--ink); }
.footer-grid { padding-bottom: 52px; display: grid; grid-template-columns: 2fr repeat(3, 1fr); gap: 52px; }
.brand-light .brand-copy small { color: rgba(255, 250, 240, .45); }
.footer-brand > p { max-width: 300px; margin: 22px 0 0; color: rgba(255, 250, 240, .55); font-size: 13px; line-height: 1.9; }
.footer-tel { display: inline-flex; align-items: center; gap: 8px; margin-top: 18px; color: var(--yellow); font-size: 16px; font-weight: 800; }
.footer-tel svg { width: 16px; height: 16px; }
.footer-tel:hover { color: var(--yellow-bright); }
.footer-links { display: flex; flex-direction: column; gap: 13px; }
.footer-links b { margin-bottom: 6px; font-size: 15px; font-weight: 800; }
.footer-links a { width: fit-content; color: rgba(255, 250, 240, .55); font-size: 13.5px; transition: color .2s; }
.footer-links a:hover { color: var(--yellow); }
.footer-bottom { min-height: 72px; padding-block: 16px; border-top: 1px solid rgba(255, 250, 240, .15); display: flex; align-items: center; justify-content: space-between; gap: 10px 24px; flex-wrap: wrap; color: rgba(255, 250, 240, .45); font-size: 12.5px; }
.footer-bottom a { color: inherit; }
.footer-bottom a:hover { color: var(--yellow); }

/* ———— 移动端吸底 ———— */
.mobile-sticky-cta { display: none; }

/* ———— 留资弹窗 ———— */
button.card-link, button.text-arrow, .inline-lead, .pill-cta button, .footer-link-btn { background: none; border: 0; padding: 0; cursor: pointer; font-family: inherit; }
.inline-lead { color: var(--orange); font-weight: 700; font-size: inherit; }
.inline-lead:hover { text-decoration: underline; }
.footer-link-btn { width: fit-content; color: rgba(255, 250, 240, .55); font-size: 13.5px; text-align: left; transition: color .2s; }
.footer-link-btn:hover { color: var(--yellow); }
body.modal-open { overflow: hidden; }
.lead-modal { position: fixed; inset: 0; z-index: 500; display: grid; place-items: center; padding: 20px; }
.lead-modal[hidden] { display: none; }
.lead-overlay { position: absolute; inset: 0; background: rgba(31, 28, 23, .55); opacity: 0; transition: opacity .24s ease; }
.lead-card {
  position: relative;
  width: min(420px, 100%);
  max-height: calc(100svh - 40px);
  overflow: auto;
  padding: 32px 28px 28px;
  background: var(--white);
  border: 2px solid var(--ink); border-radius: 18px;
  box-shadow: 8px 8px 0 var(--ink);
  opacity: 0; transform: translateY(16px) scale(.97);
  transition: opacity .24s ease, transform .24s ease;
}
.lead-modal.open .lead-overlay { opacity: 1; }
.lead-modal.open .lead-card { opacity: 1; transform: none; }
.lead-close { position: absolute; right: 14px; top: 14px; width: 36px; height: 36px; display: grid; place-items: center; background: var(--white); border: 2px solid var(--ink); border-radius: 10px; cursor: pointer; transition: background .2s; }
.lead-close:hover { background: var(--yellow-soft); }
.lead-close svg { width: 14px; height: 14px; }
.lead-card h3 { padding-right: 40px; font-size: 21px; font-weight: 900; line-height: 1.5; }
.lead-sub { margin-top: 10px; color: var(--muted); font-size: 13.5px; line-height: 1.7; }
.lead-sub a { color: var(--orange); font-weight: 700; }
.lead-form { margin-top: 22px; }
.lead-form label { display: grid; gap: 8px; margin-bottom: 14px; font-size: 13.5px; font-weight: 700; }
.lead-form label i { display: inline; color: var(--orange); font-style: normal; }
.lead-form input { min-height: 46px; padding: 0 14px; border: 2px solid var(--ink); border-radius: 10px; background: var(--surface); font: inherit; font-size: 14.5px; color: var(--ink); }
.lead-form input::placeholder { color: #a39d90; }
.lead-form input:focus { outline: none; border-color: var(--orange); background: var(--white); }
.hp { position: absolute !important; left: -9999px !important; width: 1px; height: 1px; opacity: 0; pointer-events: none; }
.lead-error { margin: 0 0 12px; color: #c0341d; font-size: 13px; font-weight: 700; }
.lead-submit { width: 100%; }
.lead-done { text-align: center; padding: 18px 0 6px; }
.lead-done-icon { width: 58px; height: 58px; margin: 0 auto 16px; display: grid; place-items: center; color: var(--ink); background: var(--yellow); border: 2px solid var(--ink); border-radius: 50%; }
.lead-done-icon svg { width: 28px; height: 28px; }
.lead-done b { display: block; font-size: 20px; }
.lead-done p { margin: 10px 0 20px; color: var(--muted); font-size: 14px; line-height: 1.8; }

/* ———— 滚动显现 ———— */
.js .reveal, .js .reveal-group > * { opacity: 0; transform: translateY(16px) scale(.99); transition: opacity .55s ease, transform .55s ease; }
.js .revealed { opacity: 1 !important; transform: translateY(0) scale(1) !important; }
.js .reveal-group > :nth-child(2) { transition-delay: .07s; }
.js .reveal-group > :nth-child(3) { transition-delay: .14s; }
.js .reveal-group > :nth-child(4) { transition-delay: .21s; }
.js .reveal-group > :nth-child(5) { transition-delay: .28s; }
.js .reveal-group > :nth-child(6) { transition-delay: .35s; }

/* ———— 响应式 ———— */
.menu-toggle { display: none; }
.mobile-nav { display: none; }

@media (max-width: 1040px) {
  .desktop-nav { gap: 22px; }
  .desktop-nav a { font-size: 14px; }
  .service-grid { grid-template-columns: 1fr 1fr; }
  .values-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 820px) {
  :root { --header-height: 64px; }
  .section-shell, .nav-shell { width: min(100% - 36px, var(--shell)); }
  .desktop-nav, .nav-actions .button, .nav-actions .text-link { display: none; }

  .menu-toggle { position: relative; display: grid; place-items: center; width: 42px; height: 42px; padding: 0; border: 0; background: transparent; cursor: pointer; }
  .menu-toggle span { position: absolute; width: 22px; height: 2.5px; border-radius: 2px; background: var(--ink); transition: transform .3s ease; }
  .menu-toggle span:first-child { transform: translateY(-4.5px); }
  .menu-toggle span:last-child { transform: translateY(4.5px); }
  .menu-toggle.open span:first-child { transform: rotate(45deg); }
  .menu-toggle.open span:last-child { transform: rotate(-45deg); }

  .mobile-nav {
    position: fixed; inset: var(--header-height) 0 auto;
    padding: 10px 24px 24px;
    display: grid;
    background: var(--bg);
    border-bottom: 2px solid var(--ink);
    box-shadow: 0 24px 40px -20px rgba(31, 28, 23, .35);
    visibility: hidden; opacity: 0; transform: translateY(-10px);
    transition: opacity .22s ease, transform .22s ease, visibility .22s;
  }
  .mobile-nav.open { visibility: visible; opacity: 1; transform: translateY(0); }
  .mobile-nav > a { padding: 15px 2px; border-bottom: 2px solid rgba(31, 28, 23, .1); font-size: 16px; font-weight: 700; }
  .mobile-nav-actions { margin-top: 16px; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

  .hero { padding: calc(var(--header-height) + 44px) 0 64px; }
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
  .hero-lead { font-size: 15.5px; }
  .hero-art { order: 2; }

  .section { padding: 76px 0; }
  .section-heading { margin-bottom: 36px; }

  .service-featured-grid { grid-template-columns: 1fr; }
  .service-featured-grid .card { padding: 28px 26px 26px; }

  .industries-section { padding: 56px 0; }

  .process-list { grid-template-columns: 1fr 1fr; gap: 32px 24px; }
  .process-list li:nth-child(2)::before { display: none; }

  .solution-grid { grid-template-columns: 1fr; }

  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .values-grid { margin-top: 44px; }

  .faq-layout { grid-template-columns: 1fr; gap: 36px; }
  .faq-intro { position: static; }

  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px 24px; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 560px) {
  .section-shell, .nav-shell { width: min(100% - 28px, var(--shell)); }
  .hero { padding-top: calc(var(--header-height) + 36px); }
  .hero h1 { font-size: clamp(31px, 8.8vw, 38px); }
  .hero-actions .button { flex: 1; min-width: 0; }
  .hero-chips { margin-top: 32px; gap: 8px; }
  .hero-chips li { padding: 7px 12px; font-size: 12px; }

  .section { padding: 64px 0; }
  .service-grid { grid-template-columns: 1fr; }

  .pill-cloud li { font-size: 13px; padding: 8px 14px; }

  .process-list { grid-template-columns: 1fr; gap: 28px; }
  .process-list li::before { display: none !important; }
  .process-list li { display: grid; grid-template-columns: 58px 1fr; column-gap: 18px; }
  .process-list h3 { margin-top: 0; align-self: center; grid-column: 2; grid-row: 1; }
  .process-list li > p { grid-column: 2; margin-top: 6px; }

  .mv-tile p { font-size: 18px; }
  .values-grid { grid-template-columns: 1fr; gap: 14px; }
  .about-info > div { flex-direction: column; gap: 4px; }
  .about-info b { width: auto; }

  .faq-list summary { font-size: 15px; padding: 16px 18px; }
  .faq-list details p { padding: 0 24px 18px 18px; font-size: 13.5px; }

  .final-cta { padding: 84px 0; }
  .final-actions { width: 100%; display: grid; grid-template-columns: 1fr 1fr; }

  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid .footer-links:last-child { grid-column: 1 / -1; }
  .footer-bottom { padding: 20px 0 96px; flex-direction: column; align-items: flex-start; gap: 6px; }

  .mobile-sticky-cta {
    position: fixed; z-index: 90; left: 0; right: 0; bottom: 0;
    height: 66px; padding: 9px 12px calc(9px + env(safe-area-inset-bottom));
    display: grid; grid-template-columns: .9fr 1.1fr; gap: 10px;
    background: rgba(255, 250, 240, .97);
    border-top: 2px solid var(--ink);
  }
  .mobile-sticky-cta a, .mobile-sticky-cta button { display: flex; align-items: center; justify-content: center; gap: 7px; border: 2px solid var(--ink); border-radius: 12px; font-size: 14px; font-weight: 800; font-family: inherit; cursor: pointer; }
  .mobile-sticky-cta svg { width: 15px; height: 15px; }
  .sticky-secondary { background: var(--white); color: var(--ink); }
  .sticky-primary { background: var(--orange); color: var(--ink); }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-delay: 0ms !important; transition-duration: .01ms !important; transition-delay: 0ms !important; }
  .js .hero-copy > *, .js .hero-art, .js .reveal, .js .reveal-group > * { opacity: 1; transform: none; animation: none; }
  .art-bob, .art-bob-late, .art-float { animation: none; }
}