/* ===========================
   众善合服务 · 官网样式
   Theme: 深空蓝紫 · 科技服务
   =========================== */

:root {
  /* 颜色 */
  --bg-0: #050816;
  --bg-1: #0A0E27;
  --bg-2: #0F1535;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);

  --text: #E6E9F5;
  --text-2: #9BA3BD;
  --text-3: #6B7393;

  --indigo: #6366F1;
  --violet: #8B5CF6;
  --cyan: #06B6D4;
  --accent: linear-gradient(135deg, #6366F1 0%, #8B5CF6 50%, #06B6D4 100%);
  --accent-soft: linear-gradient(135deg, rgba(99,102,241,.18), rgba(6,182,212,.18));

  /* 排版 */
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
          "Helvetica Neue", Arial, "Segoe UI", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  /* 尺寸 */
  --maxw: 1200px;
  --radius: 16px;
  --radius-lg: 24px;

  /* 阴影 */
  --shadow-sm: 0 6px 20px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 16px 48px rgba(99, 102, 241, 0.15);

  /* 缓动 */
  --ease: cubic-bezier(.2, .7, .2, 1);
}

/* ===== Reset ===== */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background: var(--bg-0);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
button { font: inherit; border: 0; background: none; color: inherit; cursor: pointer; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

.container { width: min(100% - 48px, var(--maxw)); margin-inline: auto; }

/* ====== 通用组件 ====== */
.section {
  position: relative;
  padding: 120px 0;
}
.section__head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.section__kicker {
  display: inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.3);
  color: #A5B4FC;
  font-size: 12px;
  letter-spacing: 0.18em;
  font-family: var(--mono);
  margin-bottom: 18px;
}
.section__title {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
}
.section__desc { color: var(--text-2); font-size: 16px; }

.chip {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--line-strong);
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 24px;
}

.grad {
  background: var(--accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 700;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), background .3s var(--ease);
  white-space: nowrap;
}
.btn--primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 8px 24px rgba(99, 102, 241, 0.35);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 14px 36px rgba(99, 102, 241, 0.45); }
.btn--ghost {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--line-strong);
  color: var(--text);
}
.btn--ghost:hover { background: rgba(255, 255, 255, 0.08); }
.btn--block { width: 100%; }

/* ====== 导航 ====== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  padding: 16px 0;
  transition: background .3s var(--ease), border .3s var(--ease), padding .3s var(--ease);
}
.nav.is-scrolled {
  background: rgba(5, 8, 22, 0.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  padding: 10px 0;
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; }

.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand__mark { width: 36px; height: 36px; flex-shrink: 0; }
.brand__mark svg { width: 100%; height: 100%; }
.brand__text { display: flex; align-items: baseline; gap: 6px; font-size: 18px; letter-spacing: 0.04em; }
.brand__text strong { font-weight: 700; color: var(--text); }
.brand__text em {
  font-style: normal;
  background: var(--accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  font-weight: 600;
}

.nav__menu { display: flex; gap: 4px; }
.nav__menu a {
  padding: 8px 16px;
  font-size: 14.5px;
  color: var(--text-2);
  border-radius: 999px;
  transition: color .25s var(--ease), background .25s var(--ease);
}
.nav__menu a:hover { color: var(--text); background: rgba(255,255,255,.04); }

/* ====== 下拉菜单 ====== */
.nav__dropdown { position: relative; }
.nav__dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.nav__dropdown-toggle svg {
  width: 12px; height: 12px;
  transition: transform .3s var(--ease);
}
.nav__dropdown:hover .nav__dropdown-toggle svg,
.nav__dropdown.is-open .nav__dropdown-toggle svg {
  transform: rotate(180deg);
}

.nav__dropdown-menu {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(-6px);
  min-width: 260px;
  padding: 10px;
  display: grid;
  gap: 2px;
  background: rgba(10, 14, 39, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--line-strong);
  border-radius: 14px;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity .25s var(--ease), transform .25s var(--ease), visibility .25s;
  z-index: 60;
}
.nav__dropdown:hover .nav__dropdown-menu,
.nav__dropdown.is-open .nav__dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}
.nav__dropdown-menu::before {
  content: "";
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%) rotate(45deg);
  width: 12px; height: 12px;
  background: rgba(10, 14, 39, 0.92);
  border-left: 1px solid var(--line-strong);
  border-top: 1px solid var(--line-strong);
  border-radius: 3px;
}
.nav__dropdown-menu a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-2);
  white-space: nowrap;
  transition: background .2s var(--ease), color .2s var(--ease);
}
.nav__dropdown-menu a:hover {
  background: rgba(99, 102, 241, 0.12);
  color: var(--text);
}
.nav__ddNum {
  font-family: var(--mono);
  font-size: 11px;
  color: #A5B4FC;
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.28);
  border-radius: 5px;
  padding: 1px 6px;
  flex-shrink: 0;
}
.nav__dropdown-menu a:hover .nav__ddNum {
  background: rgba(99, 102, 241, 0.25);
}

.nav__toggle {
  display: none;
  width: 40px; height: 40px;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  align-items: center;
  border-radius: 10px;
  border: 1px solid var(--line-strong);
}
.nav__toggle span {
  display: block;
  width: 18px; height: 2px;
  background: var(--text);
  transition: transform .3s var(--ease), opacity .3s var(--ease);
}
.nav.is-open .nav__toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav.is-open .nav__toggle span:nth-child(2) { opacity: 0; }
.nav.is-open .nav__toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ====== Hero ====== */
.hero { position: relative; padding: 200px 0 140px; overflow: hidden; }
.hero__bg {
  position: absolute; inset: 0; pointer-events: none;
}
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.55;
}
.orb--a {
  width: 520px; height: 520px;
  background: radial-gradient(circle, #6366F1 0%, transparent 70%);
  top: -160px; right: -80px;
  animation: float 14s ease-in-out infinite;
}
.orb--b {
  width: 460px; height: 460px;
  background: radial-gradient(circle, #06B6D4 0%, transparent 70%);
  bottom: -160px; left: -120px;
  animation: float 18s ease-in-out infinite reverse;
}
@keyframes float {
  0%, 100% { transform: translate(0,0); }
  50%      { transform: translate(40px, 30px); }
}
.grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(99, 102, 241, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(99, 102, 241, 0.08) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 70%);
}

.hero__inner { position: relative; text-align: center; }
.hero__title {
  font-size: clamp(34px, 5.5vw, 64px);
  line-height: 1.15;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}
.hero__sub {
  font-size: clamp(15px, 1.4vw, 18px);
  color: var(--text-2);
  max-width: 720px;
  margin: 0 auto 40px;
}
.hero__cta {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 80px;
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 880px;
  margin: 0 auto;
  padding: 28px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
}
.hero__stats li { text-align: center; }
.hero__stats strong {
  display: block;
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 700;
  background: var(--accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 4px;
}
.hero__stats span {
  font-size: 13px;
  color: var(--text-3);
  letter-spacing: 0.06em;
}

/* ====== 服务卡片 ====== */
.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 80px;
}

.card {
  position: relative;
  padding: 32px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));
  border: 1px solid var(--line);
  overflow: hidden;
  transition: transform .4s var(--ease), border .3s var(--ease);
}
.card::before {
  content: "";
  position: absolute; inset: 0;
  background: var(--accent-soft);
  opacity: 0;
  transition: opacity .4s var(--ease);
  pointer-events: none;
}
.card:hover { transform: translateY(-6px); border-color: rgba(99,102,241,0.4); }
.card:hover::before { opacity: 1; }
.card > * { position: relative; }

.card__index {
  position: absolute;
  top: 24px; right: 32px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-3);
  letter-spacing: 0.1em;
}
.card__icon {
  width: 56px; height: 56px;
  display: grid; place-items: center;
  border-radius: 14px;
  background: var(--accent-soft);
  color: #A5B4FC;
  margin-bottom: 20px;
}
.card__icon svg { width: 28px; height: 28px; }
.card h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 8px;
}
.card p {
  color: var(--text-2);
  font-size: 14.5px;
  margin-bottom: 20px;
  line-height: 1.65;
}
.card__list { display: grid; gap: 8px; }
.card__list li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  color: var(--text-2);
}
.card__list li::before {
  content: "";
  position: absolute; left: 0; top: 8px;
  width: 12px; height: 12px;
  border-radius: 4px;
  background: var(--accent);
  opacity: 0.85;
}

/* ====== 菜单服务（8项） ====== */
.menulist {
  padding: 56px 48px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(99,102,241,.04), rgba(6,182,212,.04));
  border: 1px solid var(--line);
  position: relative;
  overflow: hidden;
}
.menulist::before {
  content: "MENU";
  position: absolute;
  top: 28px; right: 36px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-3);
  letter-spacing: 0.4em;
}
.menulist__title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 36px;
}
.menulist__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.menulist__item {
  padding: 24px;
  border-radius: var(--radius);
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--line);
  transition: transform .3s var(--ease), border .3s var(--ease);
}
.menulist__item:hover { transform: translateY(-4px); border-color: rgba(99,102,241,0.4); }
.menulist__num {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  color: #A5B4FC;
  background: rgba(99,102,241,0.1);
  border: 1px solid rgba(99,102,241,0.3);
  border-radius: 6px;
  padding: 2px 8px;
  margin-bottom: 14px;
}
.menulist__item h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}
.menulist__item p {
  font-size: 13px;
  color: var(--text-3);
  line-height: 1.6;
}

/* ====== 关于 ====== */
.about__inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 56px;
  align-items: center;
}
.about__copy h2 { text-align: left; }
.about__copy .section__desc { max-width: 580px; }
.about__pillars {
  margin-top: 36px;
  display: grid;
  gap: 20px;
}
.about__pillars li {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 20px;
  align-items: flex-start;
  padding: 20px;
  border-radius: var(--radius);
  background: rgba(255,255,255,.02);
  border: 1px solid var(--line);
}
.pill {
  width: 56px; height: 56px;
  display: grid; place-items: center;
  font-size: 28px;
  font-weight: 700;
  font-family: var(--mono);
  color: #fff;
  border-radius: 12px;
  background: var(--accent);
}
.about__pillars h4 { font-size: 16px; margin-bottom: 4px; }
.about__pillars p { font-size: 14px; color: var(--text-2); }

/* ====== 团队亮点 ====== */
.about__team {
  margin-top: 32px;
  padding: 28px 24px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(99,102,241,.06), rgba(6,182,212,.06));
  border: 1px solid rgba(99,102,241,0.2);
}
.about__teamTitle {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  background: var(--accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.about__teamDesc {
  font-size: 14.5px;
  color: var(--text-2);
  line-height: 1.75;
  margin-bottom: 18px;
}
.about__teamDesc strong { color: var(--text); font-weight: 600; }
.about__teamBadges {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}
.about__teamBadges li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: 10px;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--line);
  font-size: 13px;
  color: var(--text-2);
}
.about__teamBadges li strong {
  font-size: 14px;
  font-weight: 700;
  color: #A5B4FC;
  white-space: nowrap;
}
@media (max-width: 520px) {
  .about__teamBadges { grid-template-columns: 1fr; }
}

.about__card {
  background: var(--bg-2);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.about__cardHead {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  background: rgba(0, 0, 0, 0.4);
  border-bottom: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-3);
}
.about__cardHead .dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: rgba(255,255,255,.15);
}
.about__cardHead .dot:nth-child(1) { background: #ef4444; }
.about__cardHead .dot:nth-child(2) { background: #f59e0b; }
.about__cardHead .dot:nth-child(3) { background: #10b981; }
.about__cardHead em {
  margin-left: 12px;
  font-style: normal;
  letter-spacing: 0.1em;
}
.about__cardBody { padding: 24px; display: grid; gap: 14px; }
.kv {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line);
  font-size: 14px;
}
.kv:last-child { border: 0; padding-bottom: 0; }
.kv span { color: var(--text-3); }
.kv b { color: var(--text); font-weight: 600; }

/* ====== 案例 ====== */
.cases__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.case {
  padding: 32px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.01));
  border: 1px solid var(--line);
  transition: transform .3s var(--ease), border .3s var(--ease);
}
.case:hover { transform: translateY(-4px); border-color: rgba(99,102,241,0.35); }
.case__tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--accent-soft);
  color: #A5B4FC;
  font-size: 12px;
  font-family: var(--mono);
  letter-spacing: 0.06em;
  margin-bottom: 16px;
}
.case h3 { font-size: 18px; margin-bottom: 8px; font-weight: 600; }
.case p { font-size: 14px; color: var(--text-2); }

/* ====== 资讯 ====== */
.news__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.news-card {
  padding: 32px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255,255,255,.03), rgba(255,255,255,.01));
  border: 1px solid var(--line);
  transition: transform .3s var(--ease), border .3s var(--ease);
  display: flex;
  flex-direction: column;
}
.news-card:hover { transform: translateY(-4px); border-color: rgba(99,102,241,0.35); }
.news-card__tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--accent-soft);
  color: #A5B4FC;
  font-size: 12px;
  font-family: var(--mono);
  letter-spacing: 0.06em;
  margin-bottom: 12px;
  align-self: flex-start;
}
.news-card__date {
  font-size: 12px;
  color: var(--text-3);
  font-family: var(--mono);
  margin-bottom: 14px;
}
.news-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  line-height: 1.4;
}
.news-card h3 a {
  color: inherit;
  transition: color .25s var(--ease);
}
.news-card h3 a:hover { color: #A5B4FC; }
.news-card p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.7;
  margin-bottom: 18px;
  flex: 1;
}
.news-card__more {
  font-size: 13px;
  color: #A5B4FC;
  font-weight: 500;
  transition: color .25s var(--ease);
  align-self: flex-start;
}
.news-card__more:hover { color: var(--cyan); }

.news__footer {
  text-align: center;
  margin-top: 48px;
}

/* ====== 联系 ====== */
.contact { padding-bottom: 80px; }
.contact__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: stretch;
}
.contact__list {
  display: grid;
  gap: 12px;
  margin: 24px 0 32px;
}
.contact__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 18px 22px;
  border-radius: var(--radius);
  background: rgba(255,255,255,.02);
  border: 1px solid var(--line);
}
.contact__label {
  font-size: 12px;
  color: var(--text-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  min-width: 80px;
  font-family: var(--mono);
}
.contact__list strong { font-size: 17px; font-weight: 700; }
.contact__list a:hover strong { background: var(--accent); -webkit-background-clip: text; background-clip: text; color: transparent; }
.contact__hint {
  font-size: 12px;
  color: var(--text-3);
  margin-left: 6px;
}

.contact__direct {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 22px 24px;
  border-radius: var(--radius);
  background: rgba(99,102,241,.1);
  border: 1px solid rgba(99,102,241,.3);
}
.contact__direct strong {
  font-size: 20px;
  font-weight: 700;
  background: var(--accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.contact__direct em {
  font-style: normal;
  font-size: 13px;
  color: var(--text-3);
}

/* 表单 */
.contact__form {
  padding: 36px;
  border-radius: var(--radius-lg);
  background: var(--bg-2);
  border: 1px solid var(--line-strong);
  box-shadow: var(--shadow-sm);
}
.contact__form h3 { font-size: 22px; margin-bottom: 4px; }
.contact__formHint { color: var(--text-3); font-size: 14px; margin-bottom: 22px; }
.contact__form label {
  display: block;
  margin-bottom: 18px;
}
.contact__form label > span {
  display: block;
  font-size: 13px;
  color: var(--text-2);
  margin-bottom: 6px;
}
.contact__form input,
.contact__form select,
.contact__form textarea {
  width: 100%;
  padding: 12px 14px;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  font: inherit;
  outline: none;
  transition: border .25s var(--ease);
}
.contact__form input:focus,
.contact__form select:focus,
.contact__form textarea:focus { border-color: rgba(99,102,241,0.7); }
.form__tip {
  margin-top: 14px;
  text-align: center;
  font-size: 13px;
  color: var(--text-3);
}
.form__tip strong { color: var(--text); }

/* ====== Footer ====== */
.footer {
  border-top: 1px solid var(--line);
  padding: 60px 0 24px;
  background: linear-gradient(180deg, var(--bg-1), var(--bg-0));
}
.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.brand--footer { margin-bottom: 16px; }
.footer__desc {
  font-size: 13px;
  color: var(--text-2);
  max-width: 320px;
}
.footer h5 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-3);
  margin-bottom: 16px;
  font-family: var(--mono);
}
.footer ul li { font-size: 14px; color: var(--text-2); padding: 4px 0; }
.footer ul li:hover { color: var(--text); }
.footer__bottom {
  display: flex;
  justify-content: space-between;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  color: var(--text-3);
}
.footer__bottom em {
  font-style: normal;
  background: var(--accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ====== 悬浮联系按钮 ====== */
.float-cta {
  position: fixed;
  right: 24px; bottom: 24px;
  z-index: 40;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 14px 20px;
  border-radius: 14px;
  background: var(--accent);
  color: #fff;
  font-size: 13px;
  box-shadow: 0 12px 36px rgba(99,102,241,0.45);
  transition: transform .3s var(--ease);
}
.float-cta em {
  font-style: normal;
  font-size: 15px;
  font-weight: 700;
}
.float-cta:hover { transform: translateY(-4px); }

/* ====== 入场动画 ====== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.reveal.is-in { opacity: 1; transform: translateY(0); }

/* ====== 响应式 ====== */
@media (max-width: 960px) {
  .section { padding: 80px 0; }
  .nav__menu {
    position: absolute;
    top: 100%;
    left: 16px; right: 16px;
    flex-direction: column;
    gap: 4px;
    padding: 16px;
    background: var(--bg-1);
    border: 1px solid var(--line-strong);
    border-radius: var(--radius);
    margin-top: 8px;
    display: none;
  }
  .nav.is-open .nav__menu { display: flex; }
  .nav__menu a { padding: 12px 14px; border-radius: 10px; }
  .nav__toggle { display: flex; }

  /* 移动端下拉菜单：流式嵌入，点击展开 */
  .nav__dropdown { width: 100%; }
  .nav__dropdown-toggle {
    width: 100%;
    justify-content: space-between;
    padding: 12px 14px;
    border-radius: 10px;
    color: var(--text-2);
  }
  .nav__dropdown.is-open .nav__dropdown-toggle,
  .nav__dropdown-toggle:hover { color: var(--text); background: rgba(255,255,255,.04); }
  .nav__dropdown-menu {
    position: static;
    transform: none;
    min-width: 0;
    margin: 4px 0 6px;
    padding: 6px 8px 6px 18px;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border: 1px solid var(--line);
    border-radius: 10px;
    box-shadow: none;
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    display: none;
    transition: none;
  }
  .nav__dropdown-menu::before { display: none; }
  .nav__dropdown.is-open .nav__dropdown-menu { display: grid; }
  .nav__dropdown-menu a {
    padding: 9px 12px;
    font-size: 13.5px;
  }

  .services__grid { grid-template-columns: 1fr; }
  .about__inner { grid-template-columns: 1fr; gap: 40px; }
  .contact__inner { grid-template-columns: 1fr; gap: 40px; }
  .cases__grid { grid-template-columns: 1fr; }
  .news__grid { grid-template-columns: 1fr; }
  .menulist { padding: 40px 24px; }
  .menulist__grid { grid-template-columns: repeat(2, 1fr); }
  .footer__inner { grid-template-columns: 1fr; gap: 24px; }
  .footer__bottom { flex-direction: column; gap: 8px; text-align: center; }
  .float-cta { right: 16px; bottom: 16px; padding: 12px 16px; font-size: 12px; }
  .float-cta em { font-size: 14px; }
  .hero { padding: 160px 0 100px; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); padding: 20px; }
}

@media (max-width: 520px) {
  .menulist__grid { grid-template-columns: 1fr; }
  .container { width: calc(100% - 32px); }
  .hero__title { font-size: 32px; }
}