/* ==========================================================================
   星萃肌 · 焕活肌肤原生之美 官方网站样式
   品牌焕彩版 VI（源自 logo：品牌紫 × 青蓝 × 铜金） · 响应式 · 零外部依赖
   ========================================================================== */

:root {
  /* ===== 品牌色板（取自 logo 像素聚类） ===== */
  --c-primary: #5B2D8B;        /* 品牌紫 · 主色（logo 字标紫 hue 270-288） */
  --c-primary-2: #7A3FB0;      /* 亮紫 · 渐变中继 */
  --c-deep: #221238;           /* 深紫黑 · 页头/深底 */
  --c-deeper: #150A24;         /* 更深紫黑 · 页脚 */
  --c-teal: #0E7FA6;           /* 品牌青蓝（logo 轨道 hue 191-202） */
  --c-blue: #1F4FA0;           /* 品牌蓝（logo 轨道 hue 214-228） */
  --c-gold: #A8906C;           /* 品牌铜金（logo slogan） */
  --c-gold-light: #C8B08A;     /* 浅金 · 高光 */
  --c-bronze: #8A744F;         /* 古铜 */
  --c-purple-grey: #9088A5;    /* 灰紫 · 次要文字 */
  --c-lilac: #CDC3E3;          /* 浅紫 · 深底文字 */
  --c-dark-grey: #565064;      /* 深灰紫 · 正文 */
  --c-bg: #F7F5FA;             /* 浅页底 */
  --c-white: #FFFFFF;
  --c-card-dark: #2E1A48;      /* 深底上的卡片 */

  /* 品牌渐变 */
  --grad-brand: linear-gradient(120deg, #5B2D8B 0%, #7A3FB0 45%, #0E7FA6 100%);
  --grad-brand-soft: linear-gradient(120deg, rgba(91,45,139,.12), rgba(14,127,166,.12));
  --grad-gold: linear-gradient(120deg, #C8B08A 0%, #A8906C 100%);
  --grad-dark: linear-gradient(135deg, #221238 0%, #3A1E5E 55%, #4A2A78 100%);

  /* 字体 */
  --font-display: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  --font-num: "Inter", "Helvetica Neue", Arial, sans-serif;

  /* 布局 */
  --container: 1200px;
  --gutter: 24px;
  --radius: 18px;
  --radius-sm: 12px;
  --header-h: 72px;

  --shadow: 0 8px 30px rgba(34, 18, 56, .08);
  --shadow-lift: 0 16px 40px rgba(91, 45, 139, .16);
  --shadow-glow-gold: 0 8px 24px rgba(168, 144, 108, .38);
  --shadow-glow-brand: 0 10px 26px rgba(91, 45, 139, .34);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-dark-grey);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(91,45,139,.85); color: #fff; }

a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); }

/* ===== 排版 ===== */
.display {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--c-deep);
  line-height: 1.32;
}
.kicker {
  display: inline-block;
  font-family: var(--font-num);
  font-size: 13px;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  background: var(--grad-gold);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 600;
}
.section-title { font-size: clamp(26px, 3.4vw, 36px); }
.section-desc { max-width: 640px; margin: 12px auto 0; font-size: 15px; }
/* 标题下品牌渐变装饰线 */
.sec-head .section-title { position: relative; display: inline-block; padding-bottom: 14px; }
.sec-head .section-title::after {
  content: ""; position: absolute; left: 50%; bottom: 0; transform: translateX(-50%);
  width: 56px; height: 3px; border-radius: 3px;
  background: var(--grad-brand);
}

/* ===== 按钮体系 ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 30px; border-radius: 26px;
  font-size: 16px; font-weight: 600; cursor: pointer;
  border: none; transition: transform .15s ease, box-shadow .2s ease, background .2s ease, filter .2s ease;
  white-space: nowrap;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); filter: brightness(.96); }

/* 主按钮：品牌紫→青蓝 渐变 */
.btn-primary {
  background: var(--grad-brand); color: #fff;
  box-shadow: 0 6px 18px rgba(91,45,139,.28);
}
.btn-primary:hover { box-shadow: var(--shadow-glow-brand); }

/* 金按钮：铜金渐变（高价值 CTA） */
.btn-gold {
  background: var(--grad-gold); color: #2A1E10;
  box-shadow: 0 6px 18px rgba(168,144,108,.3);
}
.btn-gold:hover { box-shadow: var(--shadow-glow-gold); }

/* 幽灵按钮（深底） */
.btn-ghost {
  background: rgba(255,255,255,.08); color: #fff;
  border: 1px solid rgba(255,255,255,.25);
  backdrop-filter: blur(4px);
}
.btn-ghost:hover { background: rgba(255,255,255,.16); }

/* 描边按钮（浅底） */
.btn-outline {
  background: #fff; color: var(--c-primary);
  border: 1px solid #DDD3EC;
}
.btn-outline:hover { border-color: var(--c-primary); box-shadow: 0 6px 16px rgba(91,45,139,.12); }

/* ===== Header / 导航栏 ===== */
.header {
  position: sticky; top: 0; z-index: 100;
  background: linear-gradient(180deg, #241336 0%, var(--c-deep) 100%);
  box-shadow: 0 2px 16px rgba(21,10,36,.35);
}
.header::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(200,176,138,.45), transparent);
}
.header-inner {
  height: var(--header-h);
  display: flex; align-items: center; justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 12px; }
/* 原子图标锁：透明图标直贴深底，青蓝光晕投影，悬停轻旋 */
.brand-mark-img {
  height: 46px; width: 46px; object-fit: contain; flex-shrink: 0;
  filter: drop-shadow(0 2px 8px rgba(14,127,166,.38));
  transition: transform .3s cubic-bezier(.34,1.56,.64,1);
}
.brand:hover .brand-mark-img { transform: rotate(10deg) scale(1.06); }
.brand-name { display: flex; flex-direction: column; line-height: 1.2; gap: 3px; }
.brand-name b {
  color: #fff; font-size: 21px; font-weight: 700;
  font-family: var(--font-display); letter-spacing: 3px;
}
.brand-name span {
  font-size: 11px; letter-spacing: 1.5px;
  background: var(--grad-gold);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  font-weight: 500;
}

.nav { display: flex; align-items: center; gap: 32px; }
.nav a {
  color: var(--c-lilac); font-size: 15px; position: relative; padding: 4px 0;
  transition: color .2s;
}
.nav a:hover { color: #fff; text-shadow: 0 0 14px rgba(200,176,138,.55); }
.nav a.active { color: var(--c-gold-light); font-weight: 600; }
.nav a.active::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -4px;
  height: 2px; border-radius: 2px;
  background: var(--grad-gold);
  box-shadow: 0 0 8px rgba(200,176,138,.6);
}
.header-cta { display: flex; align-items: center; gap: 12px; }

/* 汉堡菜单 */
.nav-toggle {
  display: none; flex-direction: column; gap: 5px; cursor: pointer;
  background: none; border: none; padding: 8px;
}
.nav-toggle span { width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: .3s; }

/* ===== Hero（首页首屏） ===== */
.hero {
  background:
    radial-gradient(720px 480px at 88% -10%, rgba(14,127,166,.28), transparent 60%),
    radial-gradient(560px 460px at -8% 108%, rgba(122,63,176,.35), transparent 62%),
    var(--grad-dark);
  color: #fff; position: relative; overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; width: 520px; height: 520px; border-radius: 50%;
  background: radial-gradient(circle, rgba(200,176,138,.20), transparent 68%);
  top: -140px; right: -120px;
}
.hero-inner {
  position: relative; display: grid; grid-template-columns: 1.1fr .9fr;
  gap: 48px; align-items: center; padding: 88px 0;
}
.hero h1 {
  font-family: var(--font-display); font-weight: 800; color: #fff;
  font-size: clamp(30px, 4.6vw, 52px); line-height: 1.3; margin: 18px 0 20px;
}
.hero .lead { color: #CFC3E4; font-size: 17px; max-width: 560px; }
.hero-cta { display: flex; gap: 16px; margin-top: 30px; flex-wrap: wrap; }
.hero-trust { margin-top: 24px; color: var(--c-purple-grey); font-size: 13px; }

.hero-visual {
  background: linear-gradient(160deg, rgba(46,26,72,.92), rgba(34,18,56,.85));
  border-radius: 28px; padding: 40px;
  display: flex; flex-direction: column; align-items: center; gap: 22px;
  border: 1px solid rgba(200,176,138,.24);
  box-shadow: 0 24px 60px rgba(21,10,36,.45), inset 0 1px 0 rgba(255,255,255,.06);
}
.hero-glow {
  width: 200px; height: 200px; border-radius: 50%;
  background: radial-gradient(circle, rgba(200,176,138,.5), rgba(14,127,166,.12) 55%, transparent 72%);
}
.hero-visual h3 { color: #fff; font-family: var(--font-display); font-size: 22px; }
.hero-visual .sub {
  font-size: 14px; letter-spacing: 1px;
  background: var(--grad-gold);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  font-weight: 600;
}
.hero-pills { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }
.pill {
  padding: 8px 16px; border-radius: 20px;
  background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.12);
  color: #DDD3EE; font-size: 14px;
}

/* ===== 页面标题区（内页 hero） ===== */
.page-hero {
  background:
    radial-gradient(480px 260px at 85% 0%, rgba(14,127,166,.25), transparent 65%),
    var(--grad-dark);
  color: #fff; padding: 64px 0; text-align: center; position: relative; overflow: hidden;
}
.page-hero h1 { color: #fff; font-size: clamp(30px, 4vw, 44px); margin: 12px 0; }
.page-hero .lead { color: #C4B6DA; font-size: 15px; }

/* ===== 区块 ===== */
.section { padding: 80px 0; }
.section.alt { background: #fff; }
.section.centered { text-align: center; }
.sec-head { text-align: center; margin-bottom: 44px; }

/* 信任条 */
.trust-bar { background: #fff; padding: 36px 0; }
.trust-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.trust-grid b {
  display: block; font-size: 20px;
  background: var(--grad-brand);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.trust-grid span { color: var(--c-purple-grey); font-size: 12px; }

/* 卡片网格 */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: #fff; border-radius: var(--radius); padding: 28px;
  box-shadow: var(--shadow); border: 1px solid #EDE8F4;
  display: flex; flex-direction: column; gap: 14px;
  position: relative; overflow: hidden;
  transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease;
}
/* 卡片顶部品牌渐变描边 */
.card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--grad-brand); opacity: 0; transition: opacity .22s ease;
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lift); border-color: #DCD2EC; }
.card:hover::before { opacity: 1; }
.card .num {
  font-family: var(--font-num); font-weight: 700; font-size: 14px;
  background: var(--grad-gold);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.card h3 { color: var(--c-deep); font-size: 20px; }
.card p { font-size: 14px; color: var(--c-dark-grey); }
.card .icon {
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--grad-brand); color: var(--c-gold-light);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-size: 20px; font-weight: 700;
  box-shadow: 0 6px 14px rgba(91,45,139,.28);
}

/* 深底卡片（合作模式等） */
.card-dark {
  background: linear-gradient(155deg, #31194E 0%, var(--c-card-dark) 70%);
  border-color: rgba(200,176,138,.18);
}
.card-dark h3 { color: #fff; }
.card-dark p { color: #A99CC4; }
.card-dark .num { color: transparent; } /* num 使用渐变文字 */

/* 深底区块 */
.section.dark {
  background:
    radial-gradient(600px 380px at 90% 0%, rgba(14,127,166,.18), transparent 60%),
    var(--grad-dark);
}
.section.dark .display, .section.dark .section-desc { color: #fff; }
.section.dark .section-desc { color: #C4B6DA; }

/* 支持体系 6 宫格 */
.support-grid { grid-template-columns: repeat(3, 1fr); }
.support-grid .card { background: var(--c-bg); box-shadow: none; border-color: #EAE3F3; }
.support-grid .card:hover { background: #fff; box-shadow: var(--shadow-lift); }
.support-grid .card h3 { color: var(--c-primary); font-size: 18px; }

/* 流程步骤 */
.step { text-align: left; }
.step .num {
  font-family: var(--font-num); font-size: 26px; font-weight: 700;
  background: var(--grad-brand);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* 合规边界条 */
.boundary {
  background:
    radial-gradient(420px 200px at 100% 0%, rgba(14,127,166,.22), transparent 65%),
    linear-gradient(135deg, #2B1547, var(--c-deep));
  border: 1px solid rgba(200,176,138,.16);
  border-radius: var(--radius);
  padding: 40px 44px; display: flex; align-items: center; justify-content: space-between;
  gap: 32px; flex-wrap: wrap;
  box-shadow: 0 20px 50px rgba(21,10,36,.3);
}
.boundary h3 { color: #fff; font-size: 26px; }
.boundary .sub { color: var(--c-purple-grey); font-size: 14px; }
.boundary .pills { display: flex; gap: 14px; flex-wrap: wrap; }
.boundary .pill {
  background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.13);
  color: #DDD3EE; font-size: 15px;
}

/* 数据卡 */
.stat-card {
  background: #fff; border-radius: var(--radius); padding: 26px;
  box-shadow: var(--shadow); border: 1px solid #EDE8F4;
  border-left: 4px solid transparent;
  border-image: linear-gradient(180deg, #5B2D8B, #0E7FA6) 1;
}
.stat-card .val {
  font-family: var(--font-num); font-size: 32px; font-weight: 700;
  background: var(--grad-brand);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.stat-card .lbl { color: var(--c-purple-grey); font-size: 14px; }

/* FAQ */
.faq-item { background: #fff; border-radius: var(--radius-sm); padding: 24px 28px; box-shadow: var(--shadow); margin-bottom: 16px; border: 1px solid #EDE8F4; }
.faq-item h3 { color: var(--c-primary); font-size: 17px; margin-bottom: 8px; }
.faq-item p { font-size: 14px; }

/* 联系 CTA（铜金横带） */
.cta-band {
  background: var(--grad-gold); color: #2A1E10;
  text-align: center; padding: 64px 0; position: relative; overflow: hidden;
}
.cta-band::before {
  content: ""; position: absolute; width: 420px; height: 420px; border-radius: 50%;
  background: radial-gradient(circle, rgba(255,255,255,.28), transparent 65%);
  top: -200px; left: -120px;
}
.cta-band .phone { font-family: var(--font-num); font-size: clamp(30px, 5vw, 44px); font-weight: 700; margin: 12px 0; letter-spacing: 1px; }
.cta-band .sub { color: #5C4626; font-size: 14px; margin-bottom: 24px; }
.cta-band .btn { background: var(--c-deep); color: var(--c-gold-light); }

/* ===== 联系页 / 表单体系 ===== */
.contact-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact-list { display: flex; flex-direction: column; gap: 16px; }
.contact-item {
  background: #fff; border-radius: 14px; padding: 18px 22px;
  display: flex; align-items: center; gap: 16px; box-shadow: var(--shadow);
  border: 1px solid #EDE8F4; border-left: 4px solid transparent;
  border-image: linear-gradient(180deg, #7A3FB0, #0E7FA6) 1;
  transition: transform .18s ease, box-shadow .18s ease;
}
.contact-item:hover { transform: translateX(4px); box-shadow: var(--shadow-lift); }
.contact-item .lbl { color: var(--c-purple-grey); font-size: 14px; width: 76px; flex-shrink: 0; }
.contact-item .val { color: var(--c-primary); font-weight: 600; font-family: var(--font-num); font-size: 17px; }

.form-card {
  background: #fff; border-radius: 20px; padding: 34px;
  box-shadow: var(--shadow); border: 1px solid #EDE8F4;
  border-top: 3px solid; border-image: linear-gradient(90deg, #5B2D8B, #0E7FA6) 1;
}
.form-card h3 { font-family: var(--font-display); color: var(--c-deep); font-size: 22px; margin-bottom: 20px; }
.field { margin-bottom: 16px; }
.field input, .field textarea, .field select {
  width: 100%; padding: 14px 16px; border-radius: 10px; border: 1px solid #E5DEF0;
  background: var(--c-bg); font-family: var(--font-body); font-size: 15px; color: var(--c-deep);
  outline: none; transition: border .2s, box-shadow .2s, background .2s;
}
.field textarea { height: 110px; resize: vertical; }
.field input:hover, .field textarea:hover, .field select:hover { border-color: #CBBCE0; }
.field input:focus, .field textarea:focus, .field select:focus {
  border-color: var(--c-primary); background: #fff;
  box-shadow: 0 0 0 3px rgba(91,45,139,.12), 0 0 0 6px rgba(14,127,166,.06);
}
.field label { display: block; font-size: 14px; color: var(--c-dark-grey); margin-bottom: 6px; }
.form-hint { font-size: 12px; color: var(--c-purple-grey); margin-top: 12px; }
.form-msg { display: none; font-size: 14px; margin-top: 14px; padding: 12px 16px; border-radius: 10px; }
.form-msg.ok { display: block; background: #E7F6EF; color: #177E52; }
.form-msg.err { display: block; background: #FDECEA; color: #C8342C; }

/* ===== Footer ===== */
.footer {
  background:
    radial-gradient(520px 260px at 8% 0%, rgba(122,63,176,.16), transparent 60%),
    var(--c-deeper);
  color: #fff; padding: 56px 0 28px;
}
.footer-top { display: grid; grid-template-columns: 1.3fr 1fr 1fr; gap: 48px; padding-bottom: 40px; }
.footer h4 {
  font-size: 15px; margin-bottom: 16px;
  background: var(--grad-gold);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  display: inline-block;
}
.footer .brand-name b { font-size: 20px; }
.footer .tagline { color: var(--c-purple-grey); font-size: 13px; margin-top: 12px; max-width: 340px; }
.footer-col a, .footer-col li { display: block; color: var(--c-lilac); font-size: 14px; padding: 5px 0; transition: color .2s, transform .2s; }
.footer-col a:hover { color: var(--c-gold-light); transform: translateX(3px); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1); padding-top: 22px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  color: #6E6480; font-size: 12px;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .hero-inner { grid-template-columns: 1fr; padding: 60px 0; }
  .hero-visual { max-width: 480px; }
  .contact-wrap { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .grid-3, .support-grid, .grid-2 { grid-template-columns: 1fr; }
  .trust-grid { grid-template-columns: repeat(2, 1fr); }
  .section { padding: 56px 0; }

  /* 移动端导航 */
  .nav-toggle { display: flex; }
  .nav {
    position: absolute; top: var(--header-h); left: 0; right: 0;
    flex-direction: column; align-items: flex-start; gap: 0;
    background: linear-gradient(180deg, #241336, var(--c-deep));
    padding: 8px 24px 20px;
    box-shadow: 0 12px 24px rgba(21,10,36,.4);
    transform: translateY(-120%); opacity: 0; pointer-events: none; transition: .3s;
  }
  .nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav a { display: block; width: 100%; padding: 13px 0; border-bottom: 1px solid rgba(255,255,255,.08); }
  .nav a.active::after { display: none; }
  .header-cta .btn { padding: 10px 18px; font-size: 14px; }

  .footer-top { grid-template-columns: 1fr; gap: 28px; }
  .boundary { padding: 32px 24px; }
  .footer-bottom { flex-direction: column; }
  .brand-mark-img { height: 38px; width: 38px; }
  .brand-name b { font-size: 19px; letter-spacing: 2px; }
  .brand-name span { display: none; }
}