/* ============================================================
   税通管家 · 出口退税官网
   设计语言：深海军蓝 + 暖米白 + 琥珀金点缀
   ============================================================ */

:root {
  --ink: #0a1726;           /* 主色：深海军蓝 */
  --ink-2: #102439;         /* 次主色 */
  --ink-deep: #050e19;      /* 更深，页脚 / 极深阴影 */
  --paper: #f4efe5;         /* 纸面米白 */
  --paper-2: #e9e1d1;       /* 纸面次色 */
  --gold: #c6923c;          /* 琥珀金点缀 */
  --gold-2: #a57524;
  --gold-soft: rgba(198, 146, 60, .18);
  --line: rgba(10, 23, 38, .1);
  --line-strong: rgba(10, 23, 38, .22);
  --line-dark: rgba(244, 239, 229, .12);
  --line-dark-strong: rgba(244, 239, 229, .22);
  --muted: #5a6472;
  --muted-d: rgba(244, 239, 229, .62);
  --shadow-md: 0 12px 40px -18px rgba(10, 23, 38, .35);

  /* 字体策略：
     中文完全使用系统宋体（避免 Web 字体因字重合成造成的"先瘦后胖"闪动）
     英文使用 Inter（文件小、无中文字重问题） */
  --font-serif: "Songti SC", "STSong", "Hiragino Mincho ProN",
                SimSun, "NSimSun", "FangSong",
                Georgia, "Times New Roman", serif;
  --font-sans:  "Inter", "PingFang SC", "Hiragino Sans GB",
                "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

/* ---------- 字体后备栈（避免 FOUT 时视觉跳变） ---------- */
/* 中文场景下尤为关键：若 Noto Serif SC 未就绪，先落到系统自带宋体，
   而不是掉到无衬线，最大限度减少字体切换可见度。 */

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }
button { font-family: inherit; }

/* ---------- 排版 ---------- */
.serif, .display {
  font-family: var(--font-serif);
  font-feature-settings: "palt";
  letter-spacing: -0.01em;
}
.display { font-weight: 600; line-height: 1.08; letter-spacing: -0.022em; }

.eyebrow {
  font-size: 12px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.eyebrow::before {
  content: "";
  width: 22px; height: 1px;
  background: currentColor;
}

.muted { color: var(--muted); }
.rule  { height: 1px; background: var(--line); border: 0; }

/* ---------- 容器 ---------- */
.wrap    { max-width: 1240px; margin: 0 auto; padding: 0 32px; }
.wrap-sm { max-width: 940px;  margin: 0 auto; padding: 0 32px; }
@media (max-width: 640px) {
  .wrap, .wrap-sm { padding: 0 22px; }
}

/* ============================================================
   顶部导航
   ============================================================ */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  background: transparent;
  color: var(--ink);
  transition: background .35s ease, border-color .35s ease,
              backdrop-filter .35s ease, color .35s ease;
  border-bottom: 1px solid transparent;
}
.nav.on-dark { color: var(--paper); }
.nav.is-scrolled {
  background: rgba(244, 239, 229, 0.88);
  backdrop-filter: saturate(150%) blur(14px);
  -webkit-backdrop-filter: saturate(150%) blur(14px);
  border-bottom-color: var(--line);
  color: var(--ink);
}
.nav.on-dark.is-scrolled {
  background: rgba(10, 23, 38, .78);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom-color: var(--line-dark);
  color: var(--paper);
}

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

/* ---------- 品牌 ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
  line-height: 1;
}
.brand-mark {
  width: 36px; height: 36px;
  display: grid; place-items: center;
  color: var(--gold);
  flex: 0 0 auto;
  transition: transform .3s ease;
}
.brand-mark svg { width: 24px; height: 24px; }
.brand:hover .brand-mark { transform: translateY(-1px); }

.brand-text {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
}
.brand-zh {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: .04em;
  color: currentColor;
}
.brand-en {
  font-size: 10px;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: currentColor;
  opacity: .55;
  font-weight: 500;
}

/* ---------- 导航链接 ---------- */
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a {
  color: currentColor;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  opacity: .78;
  transition: opacity .2s;
  position: relative;
  padding: 6px 0;
}
.nav-links a:hover { opacity: 1; }
.nav-links a.is-active { opacity: 1; color: var(--gold); }

/* ---------- CTA 按钮 ---------- */
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--ink);
  color: var(--paper);
  padding: 11px 20px;
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  border-radius: 999px;
  transition: background .2s, transform .2s, color .2s;
  flex: 0 0 auto;
}
.nav-cta-arrow {
  transition: transform .2s;
  font-size: 13px;
}
.nav-cta:hover { background: var(--gold); color: var(--ink); transform: translateY(-1px); }
.nav-cta:hover .nav-cta-arrow { transform: translateX(3px); }

.nav.on-dark .nav-cta { background: var(--paper); color: var(--ink); }
.nav.on-dark .nav-cta:hover { background: var(--gold); }
.nav.on-dark.is-scrolled .nav-cta { background: var(--gold); color: var(--ink); }

.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  color: inherit;
  width: 42px; height: 42px;
  cursor: pointer;
  border-radius: 50%;
  transition: background .2s;
}
.nav-toggle:hover { background: rgba(244, 239, 229, .08); }
.nav.is-scrolled .nav-toggle:hover { background: rgba(10, 23, 38, .06); }
.nav-toggle svg { width: 22px; height: 22px; margin: auto; }

@media (max-width: 960px) {
  .nav-links, .nav-inner > .nav-cta { display: none; }
  .nav-toggle { display: grid; place-items: center; }
}

/* ---------- 移动抽屉 ---------- */
.drawer {
  position: fixed;
  inset: 0;
  z-index: 60;
  background: var(--paper);
  transform: translateY(-100%);
  transition: transform .4s cubic-bezier(.2,.7,.2,1);
  display: flex;
  flex-direction: column;
}
.drawer.open { transform: translateY(0); }
.drawer-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 32px;
  border-bottom: 1px solid var(--line);
}
.drawer-body {
  padding: 24px 32px 40px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.drawer-body a {
  display: block;
  padding: 16px 0;
  color: var(--ink);
  text-decoration: none;
  font-size: 22px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-serif);
  font-weight: 500;
}
.drawer-body .nav-cta {
  margin-top: 28px;
  justify-content: center;
  padding: 16px 20px;
  font-size: 16px;
}

/* ============================================================
   按钮
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 26px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: transform .2s ease, background .2s ease, color .2s ease, border-color .2s ease;
  font-family: inherit;
  line-height: 1;
}
.btn-primary { background: var(--gold); color: var(--ink); }
.btn-primary:hover { background: var(--gold-2); color: var(--paper); transform: translateY(-1px); }
.btn-dark { background: var(--ink); color: var(--paper); }
.btn-dark:hover { background: var(--ink-2); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: inherit; border-color: currentColor; opacity: .85; }
.btn-ghost:hover { opacity: 1; transform: translateY(-1px); border-color: var(--gold); color: var(--gold); }
.btn-arrow::after {
  content: "→";
  transition: transform .2s;
  font-size: 16px;
  line-height: 1;
}
.btn-arrow:hover::after { transform: translateX(4px); }

/* ============================================================
   首页 Hero
   ============================================================ */
.hero {
  position: relative;
  background: var(--ink);
  color: var(--paper);
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
/* 径向光 */
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(70% 55% at 88% 12%, rgba(198, 146, 60, .28), transparent 70%),
    radial-gradient(60% 50% at 8% 90%, rgba(40, 80, 130, .32), transparent 70%),
    linear-gradient(180deg, #081425 0%, #0d1f33 50%, #060e1a 100%);
  pointer-events: none;
}
/* 细微噪点/网格 */
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(244, 239, 229, .035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(244, 239, 229, .035) 1px, transparent 1px);
  background-size: 88px 88px;
  mask-image: radial-gradient(ellipse at 30% 50%, black 40%, transparent 85%);
  -webkit-mask-image: radial-gradient(ellipse at 30% 50%, black 40%, transparent 85%);
  pointer-events: none;
}

/* 巨型装饰汉字——主视觉锚点 */
.hero-watermark {
  position: absolute;
  right: -4vw;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(420px, 58vw, 880px);
  line-height: .82;
  color: transparent;
  -webkit-text-stroke: 1px rgba(198, 146, 60, .22);
  background: linear-gradient(180deg, rgba(198, 146, 60, .11) 0%, rgba(198, 146, 60, .02) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  pointer-events: none;
  user-select: none;
  z-index: 1;
  letter-spacing: -0.04em;
}
@media (max-width: 720px) {
  .hero-watermark {
    font-size: 78vw;
    right: -8vw;
    top: 58%;
    opacity: .55;
  }
}

.hero-inner {
  position: relative;
  z-index: 2;
  flex: 1;
  display: flex;
  align-items: center;
  padding: 140px 0 40px;
}
.hero-copy { max-width: 760px; }
.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(44px, 7.4vw, 104px);
  line-height: 1.0;
  letter-spacing: -0.025em;
  font-weight: 600;
  margin: 24px 0 0;
}
.hero-title em {
  font-style: normal;
  color: var(--gold);
  position: relative;
}
.hero-title em::after {
  content: "";
  position: absolute;
  left: 2px; right: 2px;
  bottom: 0.08em;
  height: 3px;
  background: var(--gold);
  opacity: .35;
  transform: scaleX(0);
  transform-origin: left;
  animation: underline 1.4s cubic-bezier(.2,.7,.2,1) .9s forwards;
}
@keyframes underline { to { transform: scaleX(1); } }

.hero-sub {
  margin-top: 32px;
  max-width: 54ch;
  font-size: clamp(16px, 1.35vw, 19px);
  color: rgba(244, 239, 229, .76);
  line-height: 1.75;
}
.hero-actions {
  margin-top: 44px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* Hero 底部排版驱动的 KPI 带 */
.hero-foot {
  position: relative;
  z-index: 2;
  border-top: 1px solid var(--line-dark);
  padding: 28px 0;
}
.hero-foot-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.hero-foot-grid > div {
  padding: 4px 24px 4px 0;
  border-right: 1px solid var(--line-dark);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.hero-foot-grid > div:last-child { border-right: 0; }
.hero-foot-grid > div + div { padding-left: 24px; }
.hero-foot-grid .k {
  font-size: 11px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--gold);
  font-weight: 500;
}
.hero-foot-grid .v {
  font-family: var(--font-serif);
  font-size: clamp(18px, 1.8vw, 22px);
  font-weight: 500;
  color: var(--paper);
  letter-spacing: -0.01em;
}
.hero-foot-grid .v em {
  font-style: normal;
  color: var(--gold);
}

@media (max-width: 860px) {
  .hero-foot-grid { grid-template-columns: repeat(2, 1fr); gap: 18px 0; }
  .hero-foot-grid > div:nth-child(2n) { border-right: 0; }
  .hero-foot-grid > div:nth-child(n+3) { border-top: 1px solid var(--line-dark); padding-top: 18px; }
  .hero-foot-grid > div + div { padding-left: 24px; }
  .hero-foot-grid > div:nth-child(odd) { padding-left: 0 !important; }
}

/* ============================================================
   内页 Hero
   ============================================================ */
.page-hero {
  background: var(--ink);
  color: var(--paper);
  padding: 200px 0 120px;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(60% 50% at 80% 20%, rgba(198, 146, 60, .18), transparent 70%),
    linear-gradient(180deg, #081425 0%, #0d1f33 100%);
  pointer-events: none;
}
.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(244, 239, 229, .03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(244, 239, 229, .03) 1px, transparent 1px);
  background-size: 88px 88px;
  mask-image: radial-gradient(ellipse at 30% 50%, black 40%, transparent 85%);
  -webkit-mask-image: radial-gradient(ellipse at 30% 50%, black 40%, transparent 85%);
  pointer-events: none;
}
.page-hero .wrap { position: relative; z-index: 2; }
.page-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(40px, 5.4vw, 72px);
  line-height: 1.04;
  margin: 22px 0 0;
  font-weight: 600;
  letter-spacing: -0.022em;
  max-width: 20ch;
}
.page-hero p {
  margin-top: 22px;
  max-width: 54ch;
  color: rgba(244, 239, 229, .72);
  font-size: 17px;
  line-height: 1.75;
}
/* 内页 hero 的装饰大字（对齐首页语言） */
.page-hero .hero-watermark {
  font-size: clamp(300px, 44vw, 560px);
  right: -3vw;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1;
}
@media (max-width: 720px) {
  .page-hero .hero-watermark {
    font-size: 72vw;
    right: -6vw;
    top: 60%;
    opacity: .6;
  }
}

/* ============================================================
   区块
   ============================================================ */
section { padding: 130px 0; }
@media (max-width: 720px) { section { padding: 80px 0; } }

.sec-head { margin-bottom: 64px; max-width: 62ch; }
.sec-head h2 {
  font-family: var(--font-serif);
  font-size: clamp(32px, 4.2vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.022em;
  margin: 18px 0 0;
  font-weight: 600;
}
.sec-head p {
  margin-top: 20px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
  max-width: 54ch;
}

/* ============================================================
   服务
   ============================================================ */
.services {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line-strong);
}
.services > article {
  padding: 48px 40px 48px 0;
  border-bottom: 1px solid var(--line-strong);
  border-right: 1px solid var(--line);
  position: relative;
  transition: background .3s;
}
.services > article:last-child { border-right: 0; }
.services > article:nth-child(n+2) { padding-left: 40px; }
.services > article:hover { background: rgba(10, 23, 38, .02); }
.services .num {
  font-family: var(--font-serif);
  font-size: 13px;
  color: var(--gold);
  letter-spacing: .18em;
  text-transform: uppercase;
}
.services h3 {
  font-family: var(--font-serif);
  font-size: 28px;
  margin: 18px 0 12px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.services p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
  margin: 0;
  max-width: 30ch;
}
.services a.more {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  margin-top: 28px;
  color: var(--ink);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 3px;
  transition: color .2s, border-color .2s, letter-spacing .2s;
}
.services a.more:hover {
  border-color: var(--gold);
  color: var(--gold-2);
  letter-spacing: .02em;
}

@media (max-width: 860px) {
  .services { grid-template-columns: 1fr; }
  .services > article {
    padding: 36px 0 !important;
    border-right: 0;
  }
}

/* ============================================================
   优势
   ============================================================ */
.why {
  background: var(--ink);
  color: var(--paper);
  position: relative;
  overflow: hidden;
}
.why::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(50% 60% at 20% 10%, rgba(198, 146, 60, .12), transparent 70%);
  pointer-events: none;
}
.why .wrap { position: relative; z-index: 1; }
.why .sec-head h2 { color: var(--paper); }
.why .sec-head p  { color: var(--muted-d); }
.why .eyebrow { color: var(--gold); }

.why-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-top: 1px solid var(--line-dark-strong);
  margin: 0; padding: 0;
}
.why-grid > li {
  list-style: none;
  padding: 48px 24px 40px 0;
  border-right: 1px solid var(--line-dark);
  transition: background .3s;
}
.why-grid > li:last-child { border-right: 0; }
.why-grid > li:nth-child(n+2) { padding-left: 24px; }
.why-grid > li:hover { background: rgba(198, 146, 60, .05); }
.why-grid .idx {
  font-family: var(--font-serif);
  font-size: 13px;
  color: var(--gold);
  letter-spacing: .18em;
  text-transform: uppercase;
}
.why-grid h3 {
  font-family: var(--font-serif);
  font-size: 24px;
  margin: 18px 0 12px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.why-grid p {
  color: var(--muted-d);
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
}

@media (max-width: 960px) {
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid > li {
    padding: 32px 20px !important;
    border-bottom: 1px solid var(--line-dark);
  }
  .why-grid > li:nth-child(2n) { border-right: 0; }
}
@media (max-width: 520px) {
  .why-grid { grid-template-columns: 1fr; }
  .why-grid > li { border-right: 0 !important; }
}

/* ============================================================
   流程
   ============================================================ */
.process {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
  margin: 0; padding: 0;
}
.process::before {
  content: "";
  position: absolute;
  left: 0; right: 0;
  top: 50px;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--line-strong) 0 6px, transparent 6px 14px);
}
.process > li {
  list-style: none;
  padding-right: 28px;
  position: relative;
}
.process .step {
  width: 100px; height: 100px;
  border-radius: 50%;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  display: grid; place-items: center;
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 600;
  color: var(--ink);
  position: relative;
  z-index: 1;
  transition: background .35s, color .35s, border-color .35s, transform .35s;
}
.process > li:hover .step {
  background: var(--ink);
  color: var(--gold);
  border-color: var(--ink);
  transform: translateY(-2px);
}
.process h3 {
  font-family: var(--font-serif);
  font-size: 24px;
  margin: 28px 0 10px;
  font-weight: 600;
  letter-spacing: -0.01em;
}
.process p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
  max-width: 26ch;
}

@media (max-width: 860px) {
  .process { grid-template-columns: 1fr 1fr; gap: 44px 24px; }
  .process::before { display: none; }
}
@media (max-width: 520px) {
  .process { grid-template-columns: 1fr; }
}

/* ============================================================
   保障 / 承诺
   ============================================================ */
.promise { background: var(--paper-2); }
.promise-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 88px;
  align-items: center;
}
.promise blockquote {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(28px, 3.2vw, 44px);
  line-height: 1.28;
  font-weight: 500;
  letter-spacing: -0.015em;
  color: var(--ink);
}
.promise blockquote::before {
  content: "“";
  font-family: var(--font-serif);
  font-size: 96px;
  color: var(--gold);
  line-height: .4;
  margin-right: 8px;
  vertical-align: -22px;
}
.promise ul {
  list-style: none;
  margin: 0; padding: 0;
  display: flex;
  flex-direction: column;
  gap: 22px;
}
.promise ul li {
  padding-left: 44px;
  position: relative;
  font-size: 17px;
  line-height: 1.7;
}
.promise ul li::before {
  content: "";
  position: absolute;
  left: 0; top: 14px;
  width: 28px; height: 1px;
  background: var(--gold);
}
@media (max-width: 860px) {
  .promise-body { grid-template-columns: 1fr; gap: 44px; }
}

/* ============================================================
   表
   ============================================================ */
.table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}
.table th, .table td {
  text-align: left;
  padding: 20px 24px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
.table thead th {
  font-family: var(--font-serif);
  font-size: 12px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 500;
  border-bottom-color: var(--line-strong);
  padding-bottom: 16px;
}
.table tbody tr { transition: background .2s; }
.table tbody tr:hover { background: rgba(10, 23, 38, .025); }
.table td:first-child {
  font-family: var(--font-serif);
  font-weight: 500;
  white-space: nowrap;
  color: var(--ink);
}

/* ============================================================
   FAQ
   ============================================================ */
.faq-list { border-top: 1px solid var(--line-strong); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-q {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 28px;
  padding: 30px 0;
  background: transparent;
  border: 0;
  cursor: pointer;
  text-align: left;
  font: inherit;
  color: inherit;
}
.faq-q h3 {
  font-family: var(--font-serif);
  font-size: clamp(19px, 2vw, 24px);
  margin: 0;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.faq-toggle {
  width: 40px; height: 40px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  display: grid; place-items: center;
  flex: 0 0 auto;
  font-size: 18px;
  transition: background .25s, color .25s, border-color .25s, transform .35s ease;
  color: var(--ink);
}
.faq-item.open .faq-toggle {
  background: var(--ink);
  color: var(--gold);
  border-color: var(--ink);
  transform: rotate(45deg);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .45s ease;
}
.faq-a-inner {
  padding: 0 0 32px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.78;
  max-width: 72ch;
}

/* ============================================================
   表单
   ============================================================ */
.cta {
  background: var(--ink);
  color: var(--paper);
  position: relative;
  overflow: hidden;
}
.cta::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(60% 60% at 85% 20%, rgba(198, 146, 60, .12), transparent 70%);
  pointer-events: none;
}
.cta .wrap { position: relative; z-index: 1; }
.cta .sec-head h2 { color: var(--paper); }
.cta .sec-head p  { color: var(--muted-d); }
.cta .eyebrow { color: var(--gold); }

.form-body {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 88px;
  align-items: start;
}
.form-aside {
  display: flex;
  flex-direction: column;
}
.form-aside .item {
  display: flex;
  gap: 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-dark);
}
.form-aside .item:first-child { padding-top: 4px; }
.form-aside .item:last-child { border-bottom: 0; }
.form-aside .k {
  font-size: 11px;
  letter-spacing: .26em;
  text-transform: uppercase;
  color: var(--gold);
  flex: 0 0 108px;
  padding-top: 5px;
}
.form-aside .v {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 500;
  color: var(--paper);
  letter-spacing: -0.005em;
}

form.quote {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.field { display: flex; flex-direction: column; gap: 10px; }
.field.full { grid-column: span 2; }
.field label {
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: rgba(244, 239, 229, .55);
  font-weight: 500;
}
.field input, .field select, .field textarea {
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line-dark-strong);
  color: var(--paper);
  padding: 10px 0 12px;
  font: inherit;
  font-size: 16px;
  border-radius: 0;
  transition: border-color .25s;
  font-family: inherit;
}
.field input::placeholder,
.field textarea::placeholder {
  color: rgba(244, 239, 229, .32);
}
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-bottom-color: var(--gold);
}
.field select option { color: var(--ink); }
.field textarea { min-height: 92px; resize: vertical; line-height: 1.6; }

.form-actions {
  grid-column: span 2;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  margin-top: 16px;
  flex-wrap: wrap;
}
.form-note {
  font-size: 13px;
  color: rgba(244, 239, 229, .5);
  max-width: 44ch;
  line-height: 1.6;
}
.form-success {
  grid-column: span 2;
  background: var(--gold-soft);
  border: 1px solid var(--gold);
  color: var(--gold);
  padding: 16px 22px;
  border-radius: 4px;
  font-size: 15px;
  display: none;
}
.form-success.on { display: block; }

@media (max-width: 860px) {
  .form-body { grid-template-columns: 1fr; gap: 48px; }
  form.quote { grid-template-columns: 1fr; }
  .field.full, .form-actions, .form-success { grid-column: span 1; }
}

/* ============================================================
   页脚
   ============================================================ */
footer.site {
  background: var(--ink-deep);
  color: var(--muted-d);
  padding: 80px 0 32px;
  font-size: 14px;
}
footer.site .foot-top {
  display: grid;
  grid-template-columns: 1.4fr 2fr;
  gap: 64px;
  padding-bottom: 56px;
}
footer.site .brand { color: var(--paper); }
footer.site .brand-mark { color: var(--gold); }
footer.site .brand-zh { color: var(--paper); }
footer.site .brand-en { color: rgba(244,239,229,.4); }
footer.site .foot-tag {
  margin-top: 18px;
  color: rgba(244, 239, 229, .5);
  line-height: 1.8;
  max-width: 32ch;
}
footer.site .foot-cols {
  display: grid;
  grid-template-columns: 1fr 1fr 1.2fr;
  gap: 40px;
}
footer.site h4 {
  font-family: var(--font-serif);
  font-size: 13px;
  color: var(--paper);
  margin: 0 0 20px;
  font-weight: 500;
  letter-spacing: .02em;
  text-transform: uppercase;
  letter-spacing: .14em;
}
footer.site p {
  color: rgba(244, 239, 229, .5);
  line-height: 1.8;
  margin: 0 0 6px;
}
footer.site a {
  color: rgba(244, 239, 229, .65);
  text-decoration: none;
  display: block;
  padding: 5px 0;
  transition: color .2s;
}
footer.site a:hover { color: var(--gold); }
.foot-bottom {
  padding-top: 28px;
  border-top: 1px solid var(--line-dark);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  color: rgba(244, 239, 229, .4);
  font-size: 13px;
}
@media (max-width: 860px) {
  footer.site .foot-top { grid-template-columns: 1fr; gap: 40px; }
  footer.site .foot-cols { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 520px) {
  footer.site .foot-cols { grid-template-columns: 1fr; gap: 24px; }
}

/* 页脚二维码 */
.foot-qr {
  margin-top: 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.foot-qr img {
  width: 140px;
  height: 140px;
  object-fit: contain;
  border: 2px solid var(--line-dark);
  border-radius: 8px;
  padding: 8px;
  background: rgba(244, 239, 229, 0.03);
  transition: transform .3s ease, border-color .3s ease;
}
.foot-qr img:hover {
  transform: scale(1.05);
  border-color: var(--gold);
}
.foot-qr-label {
  color: rgba(244, 239, 229, .55);
  font-size: 12px;
  letter-spacing: .04em;
  margin: 0;
}

/* ============================================================
   入场动画
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 1s cubic-bezier(.2,.7,.2,1), transform 1s cubic-bezier(.2,.7,.2,1);
  transition-delay: var(--d, 0ms);
}
.reveal.in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
}

/* ============================================================
   辅助
   ============================================================ */
.split-2 {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 88px;
  align-items: start;
}
@media (max-width: 860px) {
  .split-2 { grid-template-columns: 1fr; gap: 32px; }
}

.stack-lg > * + * { margin-top: 26px; }