/* ========= Banfang Tech — Catppuccin Latte 浅色主题 ========= */
:root {
  /* Catppuccin Latte base */
  --ctp-base: #eff1f5;
  --ctp-mantle: #e6e9ef;
  --ctp-crust: #dce0e8;
  --ctp-surface0: #ccd0da;
  --ctp-surface1: #bcc0cc;
  --ctp-surface2: #acb0be;
  --ctp-overlay0: #9ca0b0;
  --ctp-overlay1: #8c8fa1;
  --ctp-overlay2: #7c7f93;
  --ctp-subtext0: #6c6f85;
  --ctp-subtext1: #5c5f77;
  --ctp-text: #4c4f69;
  --ctp-blue: #1e66f5;
  --ctp-lavender: #7287fd;
  --ctp-sapphire: #209fb5;
  --ctp-sky: #04a5e5;
  --ctp-teal: #179299;
  --ctp-green: #40a02b;
  --ctp-yellow: #df8e1d;
  --ctp-peach: #fe640b;
  --ctp-maroon: #e64553;
  --ctp-red: #d20f39;
  --ctp-mauve: #8839ef;
  --ctp-pink: #ea76cb;

  /* 语义映射 */
  --bg-0: #ffffff;
  --bg-1: var(--ctp-base);
  --bg-2: var(--ctp-mantle);
  --surface: #ffffff;
  --surface-hi: var(--ctp-base);
  --border: #e1e4ec;
  --border-hi: rgba(30, 102, 245, 0.35);
  --text-0: var(--ctp-text);
  --text-1: var(--ctp-subtext1);
  --text-2: var(--ctp-subtext0);
  --text-3: var(--ctp-overlay1);
  --accent: var(--ctp-blue);
  --accent-2: var(--ctp-mauve);
  --accent-3: var(--ctp-teal);
  --warn: var(--ctp-peach);
  --danger: var(--ctp-red);

  --gradient-text: linear-gradient(135deg, #1e66f5 0%, #7287fd 50%, #8839ef 100%);
  --gradient-soft: linear-gradient(135deg, rgba(30,102,245,0.08) 0%, rgba(136,57,239,0.08) 100%);
  --shadow-sm: 0 1px 2px rgba(76, 79, 105, 0.05);
  --shadow-md: 0 4px 16px rgba(76, 79, 105, 0.06), 0 1px 3px rgba(76, 79, 105, 0.04);
  --shadow-lg: 0 12px 32px rgba(30, 102, 245, 0.09), 0 2px 6px rgba(76, 79, 105, 0.05);
  --shadow-accent: 0 10px 30px rgba(30, 102, 245, 0.18);
  --radius: 14px;
  --radius-lg: 20px;
  --ease: cubic-bezier(.2,.7,.2,1);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, "Segoe UI", Roboto, sans-serif;
  background: var(--bg-0);
  color: var(--text-0);
  line-height: 1.65;
  font-size: 16px;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; transition: color .2s var(--ease); }
a:hover { color: var(--ctp-mauve); }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
strong { color: var(--text-0); font-weight: 700; }

/* ========= 背景装饰：淡网格 + 顶部柔色光斑 ========= */
.bg-grid {
  position: fixed; inset: 0; z-index: -2; pointer-events: none;
  background: linear-gradient(#ffffff, var(--ctp-base) 80%);
}
.bg-grid::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(76, 79, 105, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(76, 79, 105, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at 50% 20%, #000 20%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 20%, #000 20%, transparent 80%);
}
.bg-glow {
  position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(900px 500px at 15% -10%, rgba(30,102,245,0.10), transparent 65%),
    radial-gradient(800px 500px at 95% 0%, rgba(136,57,239,0.09), transparent 65%);
}

/* ========= 容器/版心 ========= */
.container { width: min(1200px, 92vw); margin: 0 auto; }
.section { padding: 100px 0; position: relative; }
.section--sm { padding: 64px 0; }
.section__head { text-align: center; margin-bottom: 56px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 12px; letter-spacing: .2em; text-transform: uppercase;
  color: var(--accent); font-weight: 700;
  padding: 6px 14px; border: 1px solid rgba(30,102,245,0.18);
  border-radius: 999px; background: rgba(30,102,245,0.06);
  margin-bottom: 18px;
}
.eyebrow::before {
  content: ""; width: 6px; height: 6px; border-radius: 50%;
  background: var(--accent);
}
h1, h2, h3, h4 { color: var(--text-0); font-weight: 700; line-height: 1.2; letter-spacing: -0.01em; }
h1 { font-size: clamp(34px, 5.2vw, 62px); }
h2 { font-size: clamp(26px, 3.4vw, 42px); }
h3 { font-size: clamp(19px, 1.9vw, 23px); }
p { color: var(--text-1); }
.lead { font-size: clamp(16px, 1.4vw, 19px); color: var(--text-1); max-width: 720px; margin: 0 auto; }
.gradient-text {
  background: var(--gradient-text);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}

/* ========= 导航 ========= */
.nav {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  background: rgba(255,255,255,0.82);
  border-bottom: 1px solid var(--border);
}
.nav__inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 0;
}
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--text-0); }
.logo__mark {
  width: 32px; height: 32px; border-radius: 9px;
  background: var(--gradient-text);
  display: grid; place-items: center;
  font-weight: 800; color: #ffffff; font-size: 15px;
  box-shadow: var(--shadow-accent);
}
.logo__sub { color: var(--text-3); font-size: 12px; font-weight: 500; margin-left: 4px; letter-spacing: .08em; }
.nav__menu { display: flex; align-items: center; gap: 4px; }
.nav__menu a {
  color: var(--text-1); font-weight: 500; padding: 9px 16px; border-radius: 10px;
  font-size: 15px; transition: all .2s var(--ease);
}
.nav__menu a:hover { color: var(--accent); background: var(--ctp-base); }
.nav__menu a.active { color: var(--accent); background: rgba(30,102,245,0.07); }
.nav__menu a.btn--primary,
.nav__menu a.btn--primary:hover { color: #ffffff; background: linear-gradient(135deg, var(--ctp-blue) 0%, var(--ctp-mauve) 100%); }
.nav__cta { margin-left: 8px; }
.nav__toggle {
  display: none; width: 40px; height: 40px; border-radius: 10px;
  background: var(--ctp-base); border: 1px solid var(--border);
}
.nav__toggle span {
  display: block; width: 18px; height: 2px; background: var(--text-0);
  margin: 4px auto; transition: all .3s var(--ease);
}

/* ========= 按钮 ========= */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 20px; border-radius: 10px;
  font-weight: 600; font-size: 15px;
  transition: all .25s var(--ease);
  white-space: nowrap;
}
.btn--primary {
  background: linear-gradient(135deg, var(--ctp-blue) 0%, var(--ctp-mauve) 100%);
  color: #ffffff;
  box-shadow: var(--shadow-accent);
}
.btn--primary:hover { transform: translateY(-1px); box-shadow: 0 14px 38px rgba(30,102,245,0.26); color: #fff; }
.btn--ghost {
  background: #ffffff; color: var(--text-0);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); background: #ffffff; }
.btn--lg { padding: 14px 26px; font-size: 16px; }

/* ========= Hero ========= */
.hero { padding: 80px 0 50px; position: relative; }
.hero__inner { display: grid; grid-template-columns: 1.1fr 1fr; gap: 60px; align-items: center; }
.hero h1 { margin: 14px 0 22px; }
.hero__lead { font-size: clamp(16px, 1.35vw, 19px); color: var(--text-1); margin-bottom: 32px; max-width: 560px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; }
.hero__stats { display: flex; gap: 36px; margin-top: 50px; padding-top: 30px; border-top: 1px solid var(--border); flex-wrap: wrap; }
.stat__num { font-size: 30px; font-weight: 800; background: var(--gradient-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat__label { color: var(--text-2); font-size: 13px; margin-top: 2px; }
.hero__visual { position: relative; }
.hero__visual svg { width: 100%; height: auto; filter: drop-shadow(0 20px 45px rgba(30,102,245,0.12)); }

/* ========= 信任条 ========= */
.trust { padding: 36px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); background: rgba(255,255,255,0.6); }
.trust__label { text-align: center; color: var(--text-3); font-size: 12px; letter-spacing: .18em; text-transform: uppercase; margin-bottom: 18px; font-weight: 600; }
.trust__row { display: flex; justify-content: space-around; gap: 32px; flex-wrap: wrap; }
.trust__item { color: var(--text-2); font-weight: 600; font-size: 15px; letter-spacing: .04em; transition: color .2s; }
.trust__item:hover { color: var(--accent); }

/* ========= 服务卡片 ========= */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.card {
  position: relative; padding: 28px;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all .3s var(--ease);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  opacity: 0; transition: opacity .3s;
}
.card:hover { transform: translateY(-3px); border-color: var(--border-hi); box-shadow: var(--shadow-lg); }
.card:hover::before { opacity: 1; }
.card__icon {
  width: 50px; height: 50px; border-radius: 12px;
  display: grid; place-items: center; margin-bottom: 18px;
  background: var(--gradient-soft);
  border: 1px solid rgba(30,102,245,0.12);
  color: var(--accent);
}
.card__icon svg { width: 24px; height: 24px; }
.card h3 { margin-bottom: 10px; }
.card p { color: var(--text-1); font-size: 15px; }
.card__list { margin-top: 14px; padding: 0; list-style: none; }
.card__list li { position: relative; padding-left: 24px; margin: 6px 0; color: var(--text-1); font-size: 14px; }
.card__list li::before {
  content: ""; position: absolute; left: 0; top: 7px; width: 14px; height: 14px;
  background: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231e66f5' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'><polyline points='20 6 9 17 4 12'/></svg>") center/contain no-repeat;
}

/* ========= 案例 ========= */
.case {
  display: grid; grid-template-columns: 1.05fr 1fr; gap: 50px;
  align-items: center; padding: 44px; border-radius: var(--radius-lg);
  background: var(--surface); border: 1px solid var(--border);
  margin-bottom: 26px; position: relative; overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow .3s var(--ease);
}
.case:hover { box-shadow: var(--shadow-md); }
.case:nth-child(even) { grid-template-columns: 1fr 1.05fr; }
.case:nth-child(even) .case__body { order: 2; }
.case__tag {
  display: inline-block; color: var(--accent); font-size: 11px;
  letter-spacing: .18em; text-transform: uppercase; font-weight: 800;
  padding: 4px 10px; background: rgba(30,102,245,0.08);
  border-radius: 4px;
  margin-bottom: 16px;
}
.case__body h3 { font-size: clamp(22px, 2.3vw, 30px); margin-bottom: 14px; }
.case__body p { color: var(--text-1); margin-bottom: 14px; }
.case__metrics { display: flex; gap: 28px; flex-wrap: wrap; margin-top: 22px; padding-top: 22px; border-top: 1px solid var(--border); }
.case__metric { min-width: 0; }
.case__metric b { display: block; font-size: 26px; font-weight: 800; background: var(--gradient-text); -webkit-background-clip: text; background-clip: text; color: transparent; }
.case__metric span { color: var(--text-2); font-size: 13px; }
.case__visual {
  position: relative; border-radius: 14px; overflow: hidden;
  border: 1px solid var(--border);
  background: linear-gradient(135deg, #f8faff 0%, #ffffff 100%);
}
.case__visual svg { width: 100%; height: auto; display: block; }

/* ========= 流程 ========= */
.process { counter-reset: step; position: relative; }
.process__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; position: relative; }
.process__step {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 28px;
  position: relative; counter-increment: step;
  box-shadow: var(--shadow-sm);
  transition: all .25s var(--ease);
}
.process__step:hover { box-shadow: var(--shadow-md); }
.process__step::before {
  content: "0" counter(step);
  font-size: 40px; font-weight: 800; color: transparent;
  background: var(--gradient-text); -webkit-background-clip: text; background-clip: text;
  display: block; margin-bottom: 12px; font-family: -apple-system, sans-serif;
}
.process__step h4 { margin-bottom: 8px; font-size: 17px; }
.process__step p { color: var(--text-1); font-size: 14px; }

/* ========= FAQ ========= */
.faq { max-width: 840px; margin: 0 auto; }
.faq__item {
  padding: 20px 26px; border: 1px solid var(--border);
  border-radius: var(--radius); margin-bottom: 10px;
  background: var(--surface); cursor: pointer;
  transition: all .25s var(--ease);
  box-shadow: var(--shadow-sm);
}
.faq__item[open] { border-color: var(--border-hi); }
.faq__item summary {
  display: flex; justify-content: space-between; align-items: center;
  list-style: none; font-weight: 600; color: var(--text-0); font-size: 16px;
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary::after {
  content: "+"; font-size: 22px; color: var(--accent); font-weight: 300;
  transition: transform .25s var(--ease);
}
.faq__item[open] summary::after { transform: rotate(45deg); }
.faq__item p { color: var(--text-1); margin-top: 12px; font-size: 15px; }

/* ========= CTA ========= */
.cta-band {
  padding: 72px 48px; border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #ffffff 0%, var(--ctp-base) 100%);
  border: 1px solid var(--border); text-align: center;
  position: relative; overflow: hidden;
  box-shadow: var(--shadow-md);
}
.cta-band::before, .cta-band::after {
  content: ""; position: absolute; width: 280px; height: 280px; border-radius: 50%;
  filter: blur(70px); opacity: .35;
}
.cta-band::before { background: var(--ctp-blue); top: -100px; left: -80px; }
.cta-band::after { background: var(--ctp-mauve); bottom: -120px; right: -60px; }
.cta-band > * { position: relative; z-index: 1; }
.cta-band h2 { margin-bottom: 14px; }
.cta-band p { margin-bottom: 28px; max-width: 640px; margin-left: auto; margin-right: auto; }
.cta-band .btn { margin: 6px; }

/* ========= 联系页 ========= */
.contact-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-card {
  padding: 28px; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); margin-bottom: 18px;
  box-shadow: var(--shadow-sm);
}
.contact-card h3 { margin-bottom: 10px; display: flex; align-items: center; gap: 10px; font-size: 19px; }
.contact-card h3 svg { width: 20px; height: 20px; color: var(--accent); }
.contact-card p { color: var(--text-1); margin-bottom: 6px; }
.contact-card a { font-size: 20px; font-weight: 700; color: var(--text-0); display: block; margin-top: 10px; word-break: break-all; }
.contact-card a:hover { color: var(--accent); }
.contact-card small { color: var(--text-3); font-size: 13px; }

/* ========= 关于页 ========= */
.values { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 44px; }
.value { padding: 28px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
.value b { display: block; font-size: 52px; font-weight: 800; background: var(--gradient-text); -webkit-background-clip: text; background-clip: text; color: transparent; line-height: 1; margin-bottom: 8px; }
.timeline { border-left: 2px solid var(--border); padding-left: 28px; margin-top: 28px; }
.timeline__item { position: relative; margin-bottom: 26px; }
.timeline__item::before {
  content: ""; position: absolute; left: -35px; top: 6px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 0 4px rgba(30,102,245,0.15);
}
.timeline__date { color: var(--accent); font-weight: 700; font-size: 14px; letter-spacing: .08em; }
.timeline__item h4 { margin: 4px 0 6px; }

/* ========= 页脚 ========= */
.footer {
  border-top: 1px solid var(--border); padding: 64px 0 28px;
  margin-top: 48px; background: var(--ctp-base);
}
.footer__grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 44px; margin-bottom: 40px; }
.footer h4 { font-size: 13px; letter-spacing: .14em; text-transform: uppercase; color: var(--text-0); margin-bottom: 16px; font-weight: 700; }
.footer ul { list-style: none; }
.footer ul li { margin: 8px 0; }
.footer ul a { color: var(--text-2); font-size: 14px; }
.footer ul a:hover { color: var(--accent); }
.footer p { color: var(--text-2); font-size: 14px; max-width: 380px; margin-top: 12px; }
.footer__bottom {
  display: flex; justify-content: space-between; align-items: center;
  padding-top: 24px; border-top: 1px solid var(--border);
  color: var(--text-3); font-size: 13px; flex-wrap: wrap; gap: 12px;
}
.footer__bottom a { color: var(--text-3); }
.footer__bottom a:hover { color: var(--accent); }

/* ========= 动画 ========= */
@keyframes pulse { 0%,100% { opacity: .5; transform: scale(1); } 50% { opacity: 1; transform: scale(1.06); } }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-6px); } }
@keyframes dash { to { stroke-dashoffset: -160; } }
.fade-up { opacity: 0; transform: translateY(16px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.fade-up.is-visible { opacity: 1; transform: translateY(0); }
.hero__visual svg .pulse-dot { animation: pulse 2.6s ease-in-out infinite; transform-origin: center; transform-box: fill-box; }
.hero__visual svg .float { animation: float 4.5s ease-in-out infinite; }
.hero__visual svg .dashline { stroke-dasharray: 4 6; animation: dash 10s linear infinite; }

/* ========= 响应式 ========= */
@media (max-width: 960px) {
  .section { padding: 72px 0; }
  .hero { padding: 56px 0 30px; }
  .hero__inner { grid-template-columns: 1fr; gap: 40px; }
  .grid-3, .grid-2, .process__grid, .values, .footer__grid, .contact-wrap { grid-template-columns: 1fr; }
  .case { grid-template-columns: 1fr !important; padding: 28px; gap: 28px; }
  .case:nth-child(even) .case__body { order: 0; }
  .nav__menu { display: none; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; background: rgba(255,255,255,0.98); padding: 12px 20px; border-bottom: 1px solid var(--border); gap: 0; box-shadow: var(--shadow-md); }
  .nav__menu.is-open { display: flex; }
  .nav__menu a { width: 100%; padding: 14px 10px; }
  .nav__cta { width: 100%; text-align: center; justify-content: center; margin: 8px 0 4px; }
  .nav__toggle { display: block; }
  .cta-band { padding: 48px 22px; }
  .footer__bottom { flex-direction: column; text-align: center; }
  .process__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .process__grid { grid-template-columns: 1fr; }
  .hero__stats { gap: 22px; }
  .stat__num { font-size: 24px; }
}