/* =========================================================
   视觉训练 · 首页样式
   结构：顶部导航 / 幻灯 / 开始训练 / 底部 / 领取体验课弹窗
   最大宽度 1280px，含滚动入场、悬停、弹窗等动效
   ========================================================= */

/* ---------- 变量与基础 ---------- */
:root {
  --max: 1280px;
  --orange: #ff7a18;
  --orange-deep: #f5530a;
  --orange-light: #ffb066;
  --green: #8cc63f;
  --ink: #1f2328;
  --gray: #6b7280;
  --line: #ececf0;
  --cream: #fdf5e9;
  --shadow-sm: 0 6px 18px rgba(15, 23, 42, .08);
  --shadow-md: 0 16px 40px rgba(15, 23, 42, .12);
  --ease: cubic-bezier(.22, .8, .24, 1);
}

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

/* 注意：不要在 html / body 上写 overflow-x:hidden，
   否则 body 会成为滚动容器，导致 position:sticky 的吸顶导航失效。
   横向溢出改为在源头处理（移动端抽屉菜单关闭时 display:none） */
html { -webkit-text-size-adjust: 100%; }

body.home-page,
body.site-page {
 
  color: var(--ink);
  background: #fff;
  line-height: 1.7;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; border: 0; }
ul, li { list-style: none; }
button { font-family: inherit; }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.container {
  width: 100%;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 滚动入场动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
}
.reveal.is-in { opacity: 1; transform: none; }

/* =========================================================
   1. 顶部导航
   ========================================================= */
/* 说明：这里刻意不使用 backdrop-filter 毛玻璃，也不在滚动时改变高度/行高，
   因为模糊滤镜与布局动画会让吸顶导航在滚动时逐帧重排重绘，出现卡顿 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #fff;
  border-bottom: 1px solid transparent;
  transition: box-shadow .3s ease, border-color .3s ease;
}
.site-header.is-scrolled {
  box-shadow: 0 6px 20px rgba(15, 23, 42, .08);
  border-bottom-color: var(--line);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 26px;
  height: 84px;
}

.site-logo { display: flex; align-items: center; flex: 0 0 auto; }
.site-logo img {
  height: 50px;
  width: auto;
  transition: transform .3s var(--ease);
}
.site-logo:hover img { transform: scale(1.04); }

/* 主导航 */
.main-nav { flex: 1 1 auto; display: flex; justify-content: center; }
.main-nav__list { display: flex; align-items: center; gap: 4px; }

.main-nav__item { position: relative; }
.main-nav__item > a {
  position: relative;
  display: block;
  padding: 0 16px;
  line-height: 84px;
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
  transition: color .28s var(--ease), transform .28s var(--ease);
}
.main-nav__item > a i { font-size: 12px; margin-left: 3px; opacity: .6; transition: transform .3s var(--ease); }

/* 导航下划线（悬停/当前栏目均为橙色，与设计稿一致） */
.main-nav__item > a::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 20px;
  width: 30px;
  height: 3px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--orange-light), var(--orange-deep));
  transform: translateX(-50%) scaleX(0);
  transform-origin: center;
  transition: transform .35s var(--ease);
}
.main-nav__item > a:hover { color: var(--orange-deep); }
.main-nav__item > a:hover::after,
.main-nav__item.is-active > a::after { transform: translateX(-50%) scaleX(1); }
.main-nav__item.is-active > a { color: var(--orange-deep); }
.main-nav__item > a:hover i { transform: rotate(180deg); }

/* 二级菜单 */
.sub-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  min-width: 190px;
  padding: 8px;
  background: #fff;
  border-radius: 14px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--line);
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, 14px);
  transition: opacity .3s var(--ease), transform .3s var(--ease), visibility .3s;
}
.main-nav__item:hover .sub-menu { opacity: 1; visibility: visible; transform: translate(-50%, 6px); }
.sub-menu li a {
  display: block;
  padding: 10px 14px;
  border-radius: 9px;
  font-size: 15px;
  color: #3d4451;
  transition: background .25s, color .25s, padding-left .25s;
}
.sub-menu li a:hover { background: #fff5eb; color: var(--orange-deep); padding-left: 20px; }

.site-header__actions { flex: 0 0 auto; display: flex; align-items: center; gap: 12px; position: relative; z-index: 960; }

/* 个人中心按钮 */
.btn-ucenter {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, #ff9a3c, var(--orange-deep));
  box-shadow: 0 10px 22px rgba(255, 106, 0, .26);
  overflow: hidden;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.btn-ucenter::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 20%, rgba(255, 255, 255, .45) 50%, transparent 80%);
  transform: translateX(-120%);
  transition: transform .7s var(--ease);
}
.btn-ucenter:hover { transform: translateY(-2px); box-shadow: 0 14px 28px rgba(255, 106, 0, .34); }
.btn-ucenter:hover::before { transform: translateX(120%); }
.btn-ucenter i { font-size: 15px; transition: transform .3s var(--ease); }
.btn-ucenter:hover i { transform: scale(1.15); }

/* 已登录：显示昵称（过长省略） */
.btn-ucenter span {
  position: relative;
  z-index: 1;
  max-width: 140px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
  font-size: 17px;
  cursor: pointer;
  transition: background .25s, color .25s, border-color .25s;
}
.nav-toggle:hover { background: #fff5eb; color: var(--orange-deep); border-color: var(--orange-light); }

/* 护眼模式切换按钮（样式与汉堡按钮一致，始终显示） */
.dark-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #fff;
  color: var(--ink);
  font-size: 16px;
  cursor: pointer;
  transition: background .25s, color .25s, border-color .25s;
}
.dark-toggle:hover { background: #fff5eb; color: var(--orange-deep); border-color: var(--orange-light); }

/* =========================================================
   2. 幻灯
   ========================================================= */
/* 整屏通栏：宽度占满视口，无圆角 */
.hero { position: relative; width: 100%; }

.hero-swiper {
  position: relative;
  width: 100%;
  height: 500px;
  overflow: hidden;
  background: #10192b;
}

.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity .9s var(--ease), visibility .9s;
}
.hero-slide.is-active { opacity: 1; visibility: visible; }

.hero-slide__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transform: scale(1.05);
  will-change: transform;   /* 独立合成层，避免滚动时反复重绘大图 */
  backface-visibility: hidden;
}
.hero-slide.is-active .hero-slide__bg { animation: heroKenburns 7s ease-out forwards; }
@keyframes heroKenburns {
  from { transform: scale(1.04); }
  to   { transform: scale(1.14); }
}

/* 幻灯离开视口或弹窗打开时，暂停内部动效，减少滚动时的开销 */
.hero-swiper.is-paused .hero-slide__bg,
.hero-swiper.is-paused .hero-progress__fill::after,
body.modal-open .hero-slide__bg,
body.modal-open .hero-progress__fill::after { animation-play-state: paused !important; }

/* ---------- 进度条式指示器（无底板，细线条 + 走条光点） ---------- */
.hero-progress {
  position: absolute;
  left: 50%;
  bottom: 34px;
  z-index: 3;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 12px;
}

.hero-progress__item {
  display: flex;
  align-items: center;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
}

/* 轨道：半透明白色细线 + 投影，浅色/深色图上都能看清 */
.hero-progress__bar {
  position: relative;
  display: block;
  width: 42px;
  height: 5px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .5);
  box-shadow: 0 2px 8px rgba(8, 15, 30, .28);
  transition: width .5s var(--ease), background .35s var(--ease);
}
.hero-progress__item:hover .hero-progress__bar { background: rgba(255, 255, 255, .8); }
.hero-progress__item.is-active .hero-progress__bar {
  width: 92px;
  background: rgba(255, 255, 255, .34);
}

.hero-progress__fill {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 0;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--orange-light), var(--orange-deep));
}
/* 走条前端的光点 */
.hero-progress__item.is-active .hero-progress__fill::after {
  content: '';
  position: absolute;
  top: 50%;
  right: 0;
  width: 11px;
  height: 11px;
  margin-right: -5px;
  border-radius: 50%;
  background: #fff;
  transform: translateY(-50%);
  animation: heroKnobPulse 1.6s ease-in-out infinite;
}
@keyframes heroKnobPulse {
  0%, 100% { box-shadow: 0 0 0 2px var(--orange-deep), 0 0 10px 2px rgba(255, 122, 24, .55); }
  50%      { box-shadow: 0 0 0 2px var(--orange-deep), 0 0 16px 6px rgba(255, 122, 24, .9); }
}

/* 左右箭头 */
.hero-swiper__arrow {
  position: absolute;
  top: 50%;
  z-index: 3;
  width: 54px;
  height: 54px;
  margin-top: -27px;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, .82);
  color: #243043;
  font-size: 17px;
  cursor: pointer;
  opacity: 0;
  transition: opacity .35s var(--ease), background .3s, color .3s, transform .3s var(--ease);
}
.hero-swiper__arrow--prev { left: 40px; transform: translateX(-10px); }
.hero-swiper__arrow--next { right: 40px; transform: translateX(10px); }
.hero-swiper:hover .hero-swiper__arrow { opacity: 1; transform: translateX(0); }
.hero-swiper__arrow:hover { background: linear-gradient(135deg, #ff9a3c, var(--orange-deep)); color: #fff; }

/* =========================================================
   3. 开始训练
   ========================================================= */
.train { position: relative; padding: 64px 0 86px; text-align: center; overflow: hidden; }
.train::before,
.train::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(30px);
  opacity: .5;
  pointer-events: none;
}
.train::before {
  width: 320px; height: 320px; left: -80px; top: 20px;
  background: radial-gradient(circle, rgba(255, 176, 102, .45), transparent 70%);
}
.train::after {
  width: 300px; height: 300px; right: -70px; bottom: 0;
  background: radial-gradient(circle, rgba(140, 198, 63, .35), transparent 70%);
}

.train__inner { position: relative; z-index: 2; display: flex; flex-direction: column; align-items: center; }

/* 顶部徽章 */
.train__badge {
  display: inline-flex; align-items: center; gap: 8px;
  margin-bottom: 20px; padding: 8px 20px;
  border-radius: 999px;
  font-size: 14px; font-weight: 600; letter-spacing: 1px;
  color: var(--orange-deep);
  background: #fff4ea;
  border: 1px solid #ffd9b8;
}
.train__badge i { font-size: 13px; }

/* 特性点 */
.train__feats {
  margin-top: 62px;
  display: flex; flex-wrap: wrap; justify-content: center; gap: 14px;
  list-style: none;
}
.train__feats li {
  display: inline-flex; align-items: center; gap: 9px;
  padding: 11px 24px; border-radius: 999px;
  font-size: 15px; font-weight: 600; color: #3d4451;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.train__feats li:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.train__feats li i { color: var(--orange); font-size: 15px; }

.train__slogan {
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 1px;
  color: #22303f;
}
 
.btn-train {
  position: relative;
  margin-top: 64px;
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 18px 58px 18px 24px;
  border: 0;
  border-radius: 999px;
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 2px;
  color: #fff;
  background: linear-gradient(135deg, #ffa147 0%, var(--orange-deep) 62%, #e8420a 100%);
  background-size: 180% 100%;
  box-shadow: 0 16px 34px rgba(245, 83, 10, .34);
  cursor: pointer;
  overflow: hidden;
  transition: transform .35s var(--ease), box-shadow .35s var(--ease), background-position .6s var(--ease);
}
.btn-train:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 22px 44px rgba(245, 83, 10, .42);
  background-position: 100% 0;
}
.btn-train:active { transform: translateY(-1px) scale(.99); }

/* 呼吸光圈 */
.btn-train::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  animation: trainPulse 2.6s ease-out infinite;
}
@keyframes trainPulse {
  0%   { box-shadow: 0 0 0 0 rgba(255, 122, 24, .45); }
  70%  { box-shadow: 0 0 0 26px rgba(255, 122, 24, 0); }
  100% { box-shadow: 0 0 0 0 rgba(255, 122, 24, 0); }
}

.btn-train__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .22);
  font-size: 17px;
  animation: trainIcon 2.6s ease-in-out infinite;
}
@keyframes trainIcon {
  0%, 100% { transform: scale(1); }
  50%      { transform: scale(1.12); }
}
.btn-train__text { position: relative; z-index: 1; }

.train__tip { margin-top: 18px; font-size: 15px; color: var(--gray); }

/* =========================================================
   4. 网站底部
   ========================================================= */
.site-footer {
  position: relative;
  background: linear-gradient(180deg, #141f36 0%, #0d1729 100%);
  color: rgba(226, 232, 240, .78);
  overflow: hidden;
}
.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--orange-light), var(--orange-deep));
}

.site-footer__main {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 1.2fr;
  gap: 64px;
  padding-top: 72px;
  padding-bottom: 56px;
}

/* 网站导航栏：整体右移 */
.site-footer__col:nth-child(2) {
  margin-left: 36px;
}

.site-footer__logo { display: inline-flex; align-items: center; margin-bottom: 20px; }
.site-footer__logo img { height: 46px; width: auto; filter: brightness(0) invert(1); opacity: .92; }
.site-footer__logo span {
  font-size: 26px;
  font-weight: 900;
  color: #fff;
  letter-spacing: 3px;
  line-height: 1;
}
.site-footer__logo-name { position: relative; margin-left: 12px; }
.site-footer__logo-name::after {
  content: '';
  position: absolute;
  left: 3px;
  right: 5px;
  bottom: -8px;
  height: 4px;
  border-radius: 0 0 12px 12px;
  background: linear-gradient(90deg, var(--green), #a8dd52);
}

.site-footer__desc { font-size: 15px; line-height: 1.9; max-width: 420px; }

.site-footer__contact { margin-top: 20px; display: flex; flex-direction: column; gap: 12px; font-size: 15px; }
.site-footer__contact li { display: flex; align-items: flex-start; gap: 10px; }
.site-footer__contact i { color: var(--orange-light); margin-top: 5px; }
.site-footer__contact a { transition: color .25s; }
.site-footer__contact a:hover { color: var(--orange-light); }

.site-footer__col h4 {
  font-size: 17px;
  color: #fff;
  margin-bottom: 22px;
  padding-left: 12px;
  position: relative;
}
.site-footer__col h4::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  width: 4px;
  height: 16px;
  border-radius: 3px;
  background: linear-gradient(180deg, var(--orange-light), var(--orange-deep));
}

.site-footer__links { display: flex; flex-direction: column; gap: 14px; font-size: 15px; }
.site-footer__links a {
  display: inline-block;
  transition: color .25s, transform .25s var(--ease);
}
.site-footer__links a:hover { color: var(--orange-light); transform: translateX(5px); }
.site-footer__links--plain li { line-height: 1.7; }

.site-footer__qrcodes {
  margin-top: 24px;
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: 22px;
  flex-wrap: wrap;
}
.site-footer__qrcode {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 12px;
  background: rgba(255, 255, 255, .04);
  transition: border-color .25s var(--ease), background .25s var(--ease), transform .25s var(--ease);
}
.site-footer__qrcode:hover {
  border-color: rgba(255, 255, 255, .3);
  background: rgba(255, 255, 255, .08);
  transform: translateY(-2px);
}
.site-footer__qrcode img {
  width: 110px;
  height: 110px;
  object-fit: contain;
  background: #fff;
  border-radius: 10px;
  padding: 8px;
  box-shadow: 0 6px 16px rgba(0, 0, 0, .28);
  cursor: zoom-in;
}
.site-footer__qrcode span {
  font-size: 13px;
  font-weight: 500;
  color: rgba(255, 255, 255, .85);
  white-space: nowrap;
  letter-spacing: .5px;
  text-align: center;
  line-height: 1.4;
}

/* =========================================================
   QR 二维码弹窗（lightbox）
   ========================================================= */
.qrcode-lightbox {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  visibility: hidden;
  opacity: 0;
  transition: opacity .3s var(--ease), visibility .3s var(--ease);
}
.qrcode-lightbox.is-open {
  visibility: visible;
  opacity: 1;
}
.qrcode-lightbox__overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 18, 28, .82);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.qrcode-lightbox__box {
  position: relative;
  z-index: 1;
  max-width: min(520px, 90vw);
  background: #fff;
  border-radius: 14px;
  padding: 24px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, .5);
  transform: scale(.92);
  transition: transform .3s var(--ease);
}
.qrcode-lightbox.is-open .qrcode-lightbox__box {
  transform: scale(1);
}
.qrcode-lightbox__close {
  position: absolute;
  top: 8px;
  right: 12px;
  border: 0;
  background: none;
  font-size: 30px;
  line-height: 1;
  color: #666;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
  transition: color .2s;
}
.qrcode-lightbox__close:hover {
  color: #111;
}
.qrcode-lightbox__img {
  display: block;
  max-width: 100%;
  max-height: 62vh;
  margin: 0 auto;
  object-fit: contain;
}
.qrcode-lightbox__name {
  margin: 14px 0 0;
  font-size: 15px;
  font-weight: 600;
  color: #333;
}

.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, .08);
  background: rgba(0, 0, 0, .14);
}
.site-footer__bottom-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 8px;
  flex-wrap: wrap;
  padding-top: 28px;
  padding-bottom: 30px;
  font-size: 13px;
  color: rgba(226, 232, 240, .6);
}
.site-footer__meta { display: flex; align-items: center; justify-content: center; gap: 14px; flex-wrap: wrap; }
.site-footer__meta a { transition: color .25s; }
.site-footer__meta a:hover { color: var(--orange-light); }

/* =========================================================
   5. 领取体验课弹窗
   ========================================================= */
.lead-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  padding: 78px 20px 40px;
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transition: opacity .35s var(--ease), visibility .35s var(--ease);
}
.lead-modal.is-open { opacity: 1; visibility: visible; }

.lead-modal__mask {
  position: fixed;
  inset: 0;
  background: rgba(7, 13, 26, .74);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
}

/* 弹窗尺寸与背景图一致：600 × 638 */
.lead-modal__dialog {
  position: relative;
  width: 600px;
  height: 638px;
  flex: 0 0 auto;
  transform: translateY(36px) scale(.94);
  opacity: 0;
  transition: transform .5s cubic-bezier(.2, .9, .25, 1.12), opacity .4s var(--ease);
}
.lead-modal.is-open .lead-modal__dialog { transform: none; opacity: 1; }

.lead-modal__close {
  position: absolute;
  top: -46px;
  right: 0;
  width: 38px;
  height: 38px;
  border: 1px solid rgba(255, 255, 255, .4);
  border-radius: 50%;
  background: rgba(255, 255, 255, .14);
  color: #fff;
  font-size: 15px;
  cursor: pointer;
  transition: transform .4s var(--ease), background .3s, border-color .3s;
}
.lead-modal__close:hover {
  background: var(--orange-deep);
  border-color: var(--orange-deep);
  transform: rotate(90deg) scale(1.05);
}

/* 头部：整张背景图按原始尺寸 600 × 638 铺满弹窗 */
.lead-modal__head {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-repeat: no-repeat;
  background-position: top center;
  background-size: 100% 100%;
}

/* 表单区：360 × 390，居中落在背景图白色区域内 */
.lead-modal__body {
  position: absolute;
  top: 218px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  width: 360px;
  height: 390px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.lead-form { display: flex; flex-direction: column; gap: 9px; }
.lead-form.is-hidden { display: none; }

.lead-form__row { display: flex; align-items: center; gap: 12px; }
.lead-form__row:nth-child(1) { animation: fieldIn .5s .08s var(--ease) both; }
.lead-form__row:nth-child(2) { animation: fieldIn .5s .16s var(--ease) both; }
.lead-form__row:nth-child(3) { animation: fieldIn .5s .24s var(--ease) both; }
.lead-form__row:nth-child(4) { animation: fieldIn .5s .32s var(--ease) both; }
.lead-form__row:nth-child(5) { animation: fieldIn .5s .40s var(--ease) both; }
@keyframes fieldIn {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}

.lead-form__label {
  flex: 0 0 70px;
  display: flex;
  align-items: center;
  font-size: 15px;
  font-weight: 600;
  color: #2b2b2b;
}
.lead-form__label em { font-style: normal; color: #ff3b00; margin-right: 2px; }

.lead-form__field { flex: 1 1 auto; min-width: 0; }
.lead-form__field input[type="text"] {
  width: 100%;
  height: 42px;
  padding: 0 14px;
  font-size: 15px;
  color: #26303c;
  background: var(--cream);
  border: 1px solid transparent;
  border-radius: 10px;
  outline: none;
  transition: background .25s, border-color .25s, box-shadow .25s;
}
.lead-form__field input[type="text"]::placeholder { color: #b8afa2; }
.lead-form__field input[type="text"]:focus {
  background: #fff8ee;
  border-color: var(--orange-light);
  box-shadow: 0 0 0 4px rgba(255, 154, 60, .16);
}
.lead-form__field input[type="text"]:invalid:not(:placeholder-shown) { border-color: #ffb4a2; }

.lead-form__field--radio {
  display: flex;
  align-items: center;
  gap: 28px;
  height: 42px;
  padding: 0 14px;
  background: var(--cream);
  border-radius: 10px;
}
.radio { display: inline-flex; align-items: center; gap: 8px; font-size: 15px; color: #5c564d; cursor: pointer; }
.radio input {
  appearance: none;
  -webkit-appearance: none;
  width: 17px;
  height: 17px;
  border: 2px solid #d9cbb6;
  border-radius: 50%;
  background: #fff;
  cursor: pointer;
  transition: border-color .2s, background .2s, box-shadow .2s, transform .2s;
}
.radio input:checked {
  border-color: var(--orange-deep);
  background: var(--orange-deep);
  box-shadow: inset 0 0 0 3px #fff;
  transform: scale(1.05);
}

.lead-form__submit {
  height: 48px;
  margin-top: 4px;
  border: 0;
  border-radius: 999px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 1px;
  color: #fff;
  background: linear-gradient(135deg, #ff9a3c, var(--orange-deep));
  background-size: 160% 100%;
  box-shadow: 0 14px 28px rgba(255, 106, 0, .3);
  cursor: pointer;
  transition: transform .3s var(--ease), box-shadow .3s var(--ease), background-position .5s var(--ease);
}
.lead-form__submit:hover {
  transform: translateY(-3px);
  box-shadow: 0 20px 36px rgba(255, 106, 0, .38);
  background-position: 100% 0;
}
.lead-form__submit:disabled { opacity: .72; cursor: not-allowed; transform: none; }

.lead-form__skip {
  height: 44px;
  border: 1.5px solid var(--orange-deep);
  border-radius: 999px;
  font-size: 16px;
  font-weight: 600;
  color: var(--orange-deep);
  background: #fff;
  cursor: pointer;
  transition: background .3s, color .3s, transform .3s var(--ease);
}
.lead-form__skip:hover {
  background: #fff4ea;
  transform: translateY(-2px);
}

/* 跳过表单后展示微信二维码 */
.lead-modal__qrcode {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.lead-modal__qrcode.is-active { display: flex; animation: qrcodeIn .45s var(--ease) both; }
@keyframes qrcodeIn {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: none; }
}
.lead-modal__qrcode-title {
  margin: 0 0 16px;
  font-size: 21px;
  font-weight: 700;
  line-height: 1.4;
  color: #26303c;
}
.lead-modal__qrcode-img {
  width: 210px;
  height: 210px;
  padding: 8px;
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 12px 28px rgba(3, 8, 20, .18);
}
.lead-modal__qrcode-tip {
  margin: 16px 0 0;
  font-size: 15px;
  color: #8a8175;
}

/* 弹窗内容也做入场，重开时重新播放 */
.lead-modal.is-open .lead-form__row,
.lead-modal.is-open .lead-form__submit,
.lead-modal.is-open .lead-form__skip { animation-play-state: running; }

/* =========================================================
   6. 响应式
   ========================================================= */
@media (max-width: 1200px) {
  .main-nav__item > a { padding: 0 12px; font-size: 16px; }
}

@media (max-width: 992px) {
  .site-header__inner { height: 68px; gap: 14px; justify-content: space-between; }
  .site-logo img { height: 40px; }
  .btn-ucenter { padding: 10px 16px; font-size: 14px; }
  .btn-ucenter span { display: none; }
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; }

  /* 移动端：顶栏两个按钮（个人中心 / 汉堡）等宽并靠右 */
  .site-header__actions { gap: 10px; }
  .btn-ucenter,
  .nav-toggle {
    width: 44px;
    height: 44px;
    padding: 0;
    justify-content: center;
  }

  /* 移动端抽屉导航 */
  .main-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(78vw, 320px);
    /* 关闭时直接 display:none：既不产生横向溢出，也不会影响吸顶导航 */
    display: none;
    justify-content: flex-start;
    padding: 76px 18px 30px;
    background: #fff;
    box-shadow: -12px 0 40px rgba(15, 23, 42, .16);
    overflow-y: auto;
    z-index: 950;
  }
  body.nav-open .main-nav {
    display: block;
    animation: navDrawerIn .35s var(--ease) both;
  }
  @keyframes navDrawerIn {
    from { transform: translateX(100%); }
    to   { transform: translateX(0); }
  }
  body.nav-open::after {
    content: '';
    position: fixed;
    inset: 0;
    background: rgba(8, 14, 28, .5);
    z-index: 940;
  }
  .main-nav__list { display: block; }
  .main-nav__item { border-bottom: 1px solid var(--line); }
  .main-nav__item > a {
    padding: 14px 4px;
    line-height: 1.6;
    font-size: 16px;
  }
  .main-nav__item > a::after { display: none; }
  .sub-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: 0;
    padding: 0 0 10px 12px;
    min-width: 0;
  }
  .sub-menu li a { padding: 8px 10px; }

  .hero-swiper { height: 420px; }
  .hero-swiper__arrow { display: none; }
  .hero-progress { bottom: 22px; gap: 10px; }
  .hero-progress__bar { width: 34px; }
  .hero-progress__item.is-active .hero-progress__bar { width: 74px; }

  .train { padding: 44px 0 64px; }
  .train__slogan { font-size: 20px; }
  .btn-train { padding: 15px 40px 15px 18px; font-size: 20px; }
  .btn-train__icon { width: 38px; height: 38px; font-size: 14px; }

  .site-footer__main { grid-template-columns: 1fr; gap: 34px; padding: 46px 20px 40px; }
  .site-footer__col:nth-child(2) { margin-left: 0; }
  .site-footer__bottom-inner { justify-content: center; text-align: center; }
}

/* 小屏：弹窗保持背景图比例，表单改为图片下方的白色面板 */
@media (max-width: 680px) {
  .lead-modal { padding: 62px 16px 30px; }
  .lead-modal__dialog {
    width: 100%;
    max-width: 470px;
    height: auto;
  }
  .lead-modal__head { background-size: 100% auto; }
  .lead-modal__body {
    position: relative;
    top: auto;
    left: auto;
    transform: none;
    width: 100%;
    height: auto;
    margin-top: 33.5%;
    padding: 22px 18px 24px;
    background: #fff;
    border-radius: 24px;
    box-shadow: 0 20px 46px rgba(3, 8, 20, .34);
  }
  .lead-form { gap: 11px; }
  .lead-form__label { flex: 0 0 68px; font-size: 14px; }
  .lead-form__field input[type="text"] { height: 44px; font-size: 14px; }
  .lead-form__field--radio { height: 44px; gap: 20px; }
  .lead-form__submit { height: 50px; font-size: 17px; }
  .lead-form__skip { height: 46px; font-size: 15px; }
  .lead-modal__qrcode-img { width: 176px; height: 176px; }
  .lead-modal__qrcode-title { font-size: 19px; }
}

@media (max-width: 640px) {
  .container { padding: 20px 16px; }
  .hero-swiper { height: 300px; }
  .hero-progress { bottom: 16px; gap: 8px; }
  .hero-progress__bar { width: 26px; height: 4px; }
  .hero-progress__item.is-active .hero-progress__bar { width: 56px; }
}

/* 尊重系统「减少动态效果」偏好 */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}

/* =========================================================
   护眼模式（黑夜模式）：html.dark-mode 时生效
   ========================================================= */
html.dark-mode body.home-page,
html.dark-mode body.site-page { background: #0e1420; color: #c9d2e3; }

/* 顶部导航 */
html.dark-mode .site-header { background: #141b2b; border-bottom-color: #25304a; }
html.dark-mode .main-nav__item > a { color: #c9d2e3; }
html.dark-mode .main-nav__item > a:hover,
html.dark-mode .main-nav__item.is-active > a { color: var(--orange-light); }
html.dark-mode .sub-menu { background: #1a2334; border-color: #2a3650; }
html.dark-mode .sub-menu li a { color: #c9d2e3; }
html.dark-mode .sub-menu li a:hover { background: #243049; color: var(--orange-light); }
html.dark-mode .nav-toggle,
html.dark-mode .dark-toggle { background: #1a2334; border-color: #2a3650; color: #c9d2e3; }
html.dark-mode .nav-toggle:hover,
html.dark-mode .dark-toggle:hover { background: #243049; color: var(--orange-light); border-color: var(--orange-deep); }

/* 移动端抽屉菜单 */
html.dark-mode .main-nav { background: #141b2b; }
html.dark-mode .main-nav__item { border-bottom-color: #25304a; }

/* 首页训练区 */
html.dark-mode .train__slogan { color: #eef2fa; }
html.dark-mode .train__feats li { background: #1a2334; border-color: #2a3650; color: #c9d2e3; box-shadow: none; }

/* 页头横幅 / 问答 / 留言页 */
html.dark-mode .msg-hero { background: linear-gradient(120deg, #131a2a 0%, #101624 56%, #0e1420 100%); }
html.dark-mode .msg-hero__title { color: #eef2fa; }
html.dark-mode .msg-hero__desc { color: #8f9bb3; }
html.dark-mode .qa-item,
html.dark-mode .qa-q,
html.dark-mode .qa-a { color: #d5dcea; }
html.dark-mode .qa-bubble--q { background: #26324c; }
html.dark-mode .qa-bubble--a { background: #1e3a29; }
html.dark-mode .qa-pagination a { background: #1a2334; color: #c9d2e3; }
html.dark-mode .qa-pagination a:hover { background: var(--orange-deep); color: #fff; }
html.dark-mode .qa-pagination .disabled { background: #151c2c; color: #5a6478; }

/* 会员中心 */
html.dark-mode body.member-page { background: #0e1420; }
html.dark-mode .member-panel,
html.dark-mode .member-card,
html.dark-mode .member-auth__body { background: #1a2334; border-color: #2a3650; box-shadow: none; color: #c9d2e3; }
html.dark-mode .member-panel__title { color: #eef2fa; }
html.dark-mode .member-info { color: #c9d2e3; }
html.dark-mode .member-side__tip { background: #243049; color: #d8b877; }
html.dark-mode .form-group > label { color: #c9d2e3; }
html.dark-mode .form-control { background: #111827; border-color: #2a3650; color: #e5eaf3; }
html.dark-mode table.table { color: #c9d2e3; }
html.dark-mode table.table > thead th,
html.dark-mode table.table > tbody td { border-color: #2a3650; }

/* 留言页 */
html.dark-mode .msg-body { background: transparent; }
html.dark-mode .qr-card,
html.dark-mode .msg-panel { background: #1a2334; border-color: #2a3650; box-shadow: none; }
html.dark-mode .qr-card__head h2 { color: #eef2fa; }
html.dark-mode .qr-card__media { background: #111827; }
html.dark-mode .qr-card__tip { color: #8f9bb3; }
html.dark-mode .msg-panel__title { color: #eef2fa; }
html.dark-mode .msg-panel__desc { color: #8f9bb3; }
html.dark-mode .form-group label { color: #c9d2e3; }
html.dark-mode .form-group input,
html.dark-mode .form-group select,
html.dark-mode .form-group textarea { background: #111827; border-color: #2a3650; color: #e5eaf3; }
html.dark-mode .form-group input::placeholder,
html.dark-mode .form-group textarea::placeholder { color: #5a6478; }
html.dark-mode .form-group input:focus,
html.dark-mode .form-group select:focus,
html.dark-mode .form-group textarea:focus { background: #111827; }
html.dark-mode .btn-reset { background: #1a2334; border-color: #2a3650; color: #8f9bb3; }
html.dark-mode .btn-reset:hover { background: #243049; color: var(--orange-light); }
/* 验证码图片、二维码图片保持白底以便识别，不做暗色处理 */

/* 会员中心：左侧栏 */
html.dark-mode .member-profile { background: linear-gradient(165deg, #243049 0%, #1a2334 62%); border-color: #2a3650; box-shadow: none; }
html.dark-mode .member-menu { background: #1a2334; border-color: #2a3650; box-shadow: none; }
html.dark-mode .member-menu a { color: #c9d2e3; }
html.dark-mode .member-menu a > i:first-child { background: #243049; color: var(--orange); }
html.dark-mode .member-menu a:hover { background: #243049; color: var(--orange-light); }
html.dark-mode .member-menu a.is-active { background: #33261a; color: var(--orange-light); }
html.dark-mode .list-group-item { background: #1a2334; border-color: #2a3650; color: #c9d2e3; }
html.dark-mode .list-group-item:hover { background: #243049; color: var(--orange-light); }
html.dark-mode .dropdown-menu { background: #1a2334; border-color: #2a3650; }
html.dark-mode .dropdown-item { color: #c9d2e3; }
html.dark-mode .dropdown-item:hover { background: #243049; color: var(--orange-light); }
html.dark-mode .alert { background: #243049; color: #c9d2e3; border-color: #2a3650; }

/* 会员中心：账号信息分隔线与文字 */
html.dark-mode .member-panel__title { border-bottom-color: #2a3650; }
html.dark-mode .member-side__title { border-bottom-color: #2a3650; }
html.dark-mode .member-info li { border-bottom-color: #2a3650; }
html.dark-mode .member-info li span { color: #9aa6b8; }
html.dark-mode .member-info li b { color: #e5eaf3; }
html.dark-mode .member-info__empty { color: #6b7789; }

/* 会员中心：禁用态输入框（如用户名）不再白底 */
html.dark-mode .form-control:disabled { background: #111827; border-color: #2a3650; color: #8f9bb3; }

/* 原生控件（日期选择、下拉等）跟随暗色渲染 */
html.dark-mode { color-scheme: dark; }

/* 网站底部：导航链接手机端一行显示 2 个 */
@media (max-width: 767px) {
  .site-footer__links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px 12px;
  }
  .site-footer__links li {
    width: 100%;
  }
}