/* ============================================================
   中跃新能源 · 中跃新能源科技（天津）有限公司  官网样式
   ============================================================ */

:root {
  --navy-900: #061a30;
  --navy-800: #0a2440;
  --navy-700: #103458;
  --navy-600: #17456f;
  --steel-500: #4a6b8a;
  --steel-300: #8fa5ba;
  --steel-100: #dde5ee;
  --amber-500: #ef9d24;
  --amber-400: #f5b03f;
  --amber-100: #fdf1dc;
  --ink: #16222e;
  --ink-soft: #4d5c6b;
  --line: #e3e9f0;
  --bg: #f4f7fa;
  --white: #ffffff;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow-sm: 0 2px 10px rgba(10, 36, 64, .06);
  --shadow: 0 12px 34px rgba(10, 36, 64, .10);
  --shadow-lg: 0 26px 60px rgba(6, 26, 48, .22);
  --maxw: 1200px;
  --font: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC",
          "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

/* hidden 属性优先于组件自身的 display 声明 */
[hidden] { display: none !important; }

html { scroll-behavior: smooth; scroll-padding-top: 76px; }

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--white);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 { margin: 0; line-height: 1.3; font-weight: 700; }

p { margin: 0; }

button, input, select, textarea { font-family: inherit; font-size: inherit; }

/* ---------- 通用布局 ---------- */
.wrap { width: min(var(--maxw), calc(100% - 48px)); margin: 0 auto; }

.section { padding: 92px 0; }
.section--alt { background: var(--bg); }
.section--dark { background: var(--navy-900); color: #eaf1f8; }

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 12px; letter-spacing: .22em; text-transform: uppercase;
  color: var(--amber-500); font-weight: 700; margin-bottom: 14px;
}
.eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--amber-500); }
.section--dark .eyebrow { color: var(--amber-400); }

.sec-title { font-size: clamp(26px, 3.4vw, 38px); letter-spacing: -.01em; }
.sec-desc { margin-top: 14px; color: var(--ink-soft); max-width: 720px; font-size: 16px; }
.section--dark .sec-desc { color: #a9bdd2; }

.sec-head { margin-bottom: 46px; }
.sec-head--center { text-align: center; }
.sec-head--center .sec-desc { margin-left: auto; margin-right: auto; }
.sec-head--center .eyebrow::after { content: ""; width: 26px; height: 2px; background: var(--amber-500); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px; border-radius: 999px; border: 1px solid transparent;
  font-weight: 700; font-size: 15px; cursor: pointer; transition: .22s ease;
  white-space: nowrap; background: none;
}
.btn--primary { background: var(--amber-500); color: #1b1200; box-shadow: 0 8px 20px rgba(239, 157, 36, .32); }
.btn--primary:hover { background: var(--amber-400); transform: translateY(-2px); }
.btn--ghost { border-color: rgba(255, 255, 255, .38); color: #fff; }
.btn--ghost:hover { background: rgba(255, 255, 255, .12); border-color: #fff; }
.btn--outline { border-color: var(--steel-100); color: var(--navy-700); background: #fff; }
.btn--outline:hover { border-color: var(--navy-600); background: #f7fafd; }
.btn--dark { background: var(--navy-800); color: #fff; }
.btn--dark:hover { background: var(--navy-700); transform: translateY(-2px); }
.btn--sm { padding: 8px 16px; font-size: 13.5px; }
.btn--block { width: 100%; }
.btn[disabled] { opacity: .6; cursor: not-allowed; transform: none !important; }

/* ---------- 顶部导航 ---------- */
.header {
  position: fixed; inset: 0 0 auto 0; z-index: 60;
  background: rgba(6, 26, 48, .92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  transition: .28s ease;
}
.header--solid { background: rgba(6, 26, 48, .98); box-shadow: 0 8px 26px rgba(3, 14, 26, .28); }
.header__inner { display: flex; align-items: center; gap: 28px; height: 70px; }

.logo { display: flex; align-items: center; gap: 11px; color: #fff; flex-shrink: 0; }
.logo__mark { width: 38px; height: 38px; flex-shrink: 0; }
.logo__text b { display: block; font-size: 18px; letter-spacing: .06em; line-height: 1.15; }
.logo__text span { display: block; font-size: 10px; color: var(--steel-300); letter-spacing: .16em; }

.nav { display: flex; gap: 4px; margin-left: auto; }
.nav a {
  color: #c7d6e5; padding: 8px 13px; border-radius: 8px; font-size: 14.5px;
  transition: .2s; font-weight: 500;
}
.nav a:hover { color: #fff; background: rgba(255, 255, 255, .09); }
.nav a.is-active { color: var(--amber-400); }

.header__actions { display: flex; align-items: center; gap: 10px; }

/* ---------- 语言切换 ---------- */
.lang-switch {
  background: none; border: 1px solid rgba(255,255,255,.38); color: #fff;
  font: 700 12px/1 inherit; letter-spacing: .08em;
  padding: 8px 11px; border-radius: 8px; cursor: pointer; transition: .2s;
  white-space: nowrap;
}
.lang-switch:hover { background: rgba(255,255,255,.12); border-color: #fff; }
/* 英文模式下：Logo 只显示英文行，隐藏业务模块重复的英文小字 */
.lang-en .logo__text span:not(.lang-switch) { display: none; }
.lang-en .biz__body .en { display: none; }

.user-chip {
  display: flex; align-items: center; gap: 9px; cursor: pointer;
  padding: 5px 12px 5px 6px; border-radius: 999px;
  background: rgba(255, 255, 255, .1); border: 1px solid rgba(255, 255, 255, .16);
  color: #fff; font-size: 14px;
}
.user-chip:hover { background: rgba(255, 255, 255, .18); }
.user-chip__avatar {
  width: 28px; height: 28px; border-radius: 50%; background: var(--amber-500);
  color: #1b1200; display: grid; place-items: center; font-weight: 700; font-size: 14px;
}

.burger { display: none; background: none; border: 0; padding: 8px; cursor: pointer; }
.burger span { display: block; width: 22px; height: 2px; background: #fff; margin: 5px 0; transition: .25s; }

/* ---------- 首屏 ---------- */
.hero {
  position: relative; min-height: 640px; display: flex; align-items: center;
  padding: 150px 0 90px; color: #fff; overflow: hidden;
  background: linear-gradient(160deg, #061a30 0%, #0d2b4c 52%, #12395f 100%);
}
.hero__bg {
  position: absolute; inset: 0;
  background-image: url("../img/site/hero-offshore.jpg");
  background-size: cover; background-position: center 40%;
  opacity: .38; filter: saturate(.92) contrast(1.05);
}
.hero::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(6, 26, 48, .78) 0%, rgba(6, 26, 48, .55) 45%, rgba(6, 26, 48, .95) 100%);
}
.hero__inner { position: relative; z-index: 2; max-width: 760px; }
.hero__badge {
  display: inline-flex; align-items: center; gap: 9px; padding: 7px 15px; border-radius: 999px;
  background: rgba(239, 157, 36, .16); border: 1px solid rgba(239, 157, 36, .45);
  color: var(--amber-400); font-size: 13.5px; font-weight: 700; margin-bottom: 24px;
}
.hero h1 { font-size: clamp(30px, 5vw, 52px); line-height: 1.22; letter-spacing: -.02em; }
.hero h1 em { font-style: normal; color: var(--amber-400); }
.hero__sub { margin-top: 22px; font-size: clamp(15px, 1.6vw, 18px); color: #c2d3e5; max-width: 640px; }
.hero__tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }
.hero__tags span {
  padding: 7px 14px; border-radius: 999px; font-size: 13.5px; color: #dce8f3;
  background: rgba(255, 255, 255, .08); border: 1px solid rgba(255, 255, 255, .16);
}
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }

.hero__stats {
  position: relative; z-index: 2; margin-top: 66px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px;
  background: rgba(255, 255, 255, .12); border-radius: var(--radius); overflow: hidden;
}
.hero__stats div { background: rgba(8, 30, 54, .72); padding: 22px 24px; }
.hero__stats b { display: block; font-size: 22px; color: #fff; }
.hero__stats small { color: #9db4cb; font-size: 13px; }

/* ---------- 卡片通用 ---------- */
.grid { display: grid; gap: 22px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 28px; box-shadow: var(--shadow-sm); transition: .26s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: #d3dfeb; }
.card__num {
  display: inline-block; font-size: 13px; font-weight: 700; color: var(--amber-500);
  letter-spacing: .1em; margin-bottom: 12px;
}
.card h3 { font-size: 18.5px; margin-bottom: 10px; }
.card p { color: var(--ink-soft); font-size: 14.8px; }

/* ---------- 公司概况 ---------- */
.about { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.about__text p + p { margin-top: 16px; }
.about__text p { color: var(--ink-soft); font-size: 15.6px; }
.about__points { margin-top: 26px; display: grid; gap: 13px; }
.about__points div { display: flex; gap: 12px; align-items: flex-start; font-size: 15px; font-weight: 600; color: var(--navy-700); }
.about__points svg { flex-shrink: 0; margin-top: 4px; }

.about__media { position: relative; }
.about__media img { border-radius: var(--radius); box-shadow: var(--shadow); aspect-ratio: 4/3; object-fit: cover; }
.about__media figcaption {
  position: absolute; left: 18px; bottom: 18px; right: 18px;
  background: rgba(6, 26, 48, .82); color: #e8f0f8; font-size: 13px;
  padding: 9px 14px; border-radius: 8px; backdrop-filter: blur(6px);
}
.about__facts {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 30px;
}
.about__facts div { background: var(--bg); border-radius: var(--radius-sm); padding: 16px 18px; border-left: 3px solid var(--amber-500); }
.about__facts b { display: block; font-size: 17px; color: var(--navy-800); }
.about__facts small { color: var(--ink-soft); font-size: 12.5px; }

/* ---------- 业务能力 ---------- */
.biz { display: grid; gap: 26px; }
.biz__item {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0; overflow: hidden;
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.biz__item:nth-child(even) .biz__media { order: 2; }
.biz__media img { height: 100%; min-height: 330px; object-fit: cover; }
.biz__body { padding: 40px 44px; display: flex; flex-direction: column; justify-content: center; }
.biz__body h3 { font-size: 23px; margin-bottom: 6px; }
.biz__body .en { font-size: 11.5px; letter-spacing: .2em; color: var(--steel-300); text-transform: uppercase; margin-bottom: 16px; }
.biz__body p { color: var(--ink-soft); font-size: 15.3px; }
.biz__list { margin: 20px 0 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.biz__list li { position: relative; padding-left: 22px; font-size: 14.8px; color: #33475a; }
.biz__list li::before {
  content: ""; position: absolute; left: 0; top: 10px; width: 7px; height: 7px;
  border-radius: 50%; background: var(--amber-500);
}
.biz__case {
  margin-top: 22px; padding: 12px 16px; background: var(--amber-100);
  border-radius: var(--radius-sm); font-size: 13.6px; color: #7a5310; font-weight: 600;
}

/* ---------- 保障体系 ---------- */
.guarantee { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.guarantee__card { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); transition: .26s; }
.guarantee__card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.guarantee__card img { height: 220px; width: 100%; object-fit: cover; }
.guarantee__card .in { padding: 24px 26px 28px; }
.guarantee__card h4 { font-size: 17px; margin-bottom: 8px; }
.guarantee__card p { color: var(--ink-soft); font-size: 14.5px; }

/* ---------- 工程案例 ---------- */
.case {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow-sm); margin-bottom: 34px;
}
.case__top { display: grid; grid-template-columns: 1.15fr 1fr; }
.case__main-img { position: relative; }
.case__main-img img { height: 100%; min-height: 340px; object-fit: cover; cursor: zoom-in; }
.case__tag {
  position: absolute; top: 18px; left: 18px; background: var(--amber-500); color: #1b1200;
  font-size: 12.5px; font-weight: 700; padding: 6px 14px; border-radius: 999px; letter-spacing: .04em;
}
.case__body { padding: 40px 42px; }
.case__body h3 { font-size: 24px; margin-bottom: 4px; }
.case__body .sub { color: var(--amber-500); font-weight: 700; font-size: 14.5px; margin-bottom: 16px; }
.case__body p { color: var(--ink-soft); font-size: 15.2px; }
.case__steps { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 22px; }
.case__steps span {
  font-size: 13px; padding: 6px 13px; border-radius: 6px; background: var(--bg);
  color: var(--navy-700); border: 1px solid var(--line); font-weight: 600;
}
.case__gallery {
  border-top: 1px solid var(--line); padding: 26px 28px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; background: #fbfcfe;
}
.case__gallery figure { margin: 0; }
.case__gallery img { border-radius: var(--radius-sm); aspect-ratio: 4/3; object-fit: cover; cursor: zoom-in; transition: .24s; }
.case__gallery img:hover { transform: scale(1.03); box-shadow: var(--shadow); }
.case__gallery figcaption { font-size: 12.6px; color: var(--ink-soft); margin-top: 8px; line-height: 1.5; }

/* ---------- 服务流程 ---------- */
.flow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 18px; counter-reset: flow; }
.flow__step { position: relative; padding-top: 26px; }
.flow__step::before {
  content: ""; position: absolute; top: 12px; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--amber-500) 0 22px, var(--steel-100) 22px 100%);
}
.flow__step:last-child::before { background: linear-gradient(90deg, var(--amber-500) 0 22px, transparent 22px 100%); }
.flow__dot {
  width: 26px; height: 26px; border-radius: 50%; background: var(--navy-800); color: #fff;
  display: grid; place-items: center; font-size: 12.5px; font-weight: 700;
  position: absolute; top: 0; left: 0;
}
.flow__step h4 { font-size: 16.5px; margin-bottom: 8px; }
.flow__step p { font-size: 14.2px; color: var(--ink-soft); }

/* ---------- 表单 ---------- */
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px 20px; }
.field { display: flex; flex-direction: column; gap: 7px; }
.field--full { grid-column: 1 / -1; }
.field label { font-size: 13.6px; font-weight: 600; color: #33475a; }
.field label .req { color: #d64545; }
.field input, .field select, .field textarea {
  padding: 12px 14px; border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: #fff; color: var(--ink); transition: .2s; width: 100%;
}
.field textarea { resize: vertical; min-height: 122px; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--navy-600); box-shadow: 0 0 0 3px rgba(23, 69, 111, .12);
}
.field input[readonly] { background: #f2f5f9; color: var(--ink-soft); }
.field__err { font-size: 12.6px; color: #d64545; min-height: 16px; }
.field.invalid input, .field.invalid select, .field.invalid textarea { border-color: #e08b8b; background: #fffafa; }

.check { display: flex; gap: 10px; align-items: flex-start; font-size: 13.6px; color: var(--ink-soft); }
.check input { width: auto; margin-top: 4px; }

.panel-form {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 40px 42px; box-shadow: var(--shadow-sm);
}

.split { display: grid; grid-template-columns: 1.35fr .95fr; gap: 30px; align-items: start; }
.side-note { background: var(--navy-800); color: #d7e4f0; border-radius: var(--radius); padding: 34px 32px; }
.side-note h3 { color: #fff; font-size: 19px; margin-bottom: 14px; }
.side-note ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 16px; }
.side-note li { display: flex; gap: 12px; font-size: 14.4px; }
.side-note li b { color: var(--amber-400); display: block; font-size: 13px; letter-spacing: .05em; }
.side-note .hot { margin-top: 26px; padding-top: 22px; border-top: 1px solid rgba(255, 255, 255, .14); font-size: 13.6px; color: #a9bdd2; }

/* ---------- 留言板 ---------- */
.board { display: grid; grid-template-columns: 1.1fr 1fr; gap: 30px; align-items: start; }
.board__list { display: grid; gap: 16px; max-height: 620px; overflow-y: auto; padding-right: 6px; }
.board__list::-webkit-scrollbar { width: 7px; }
.board__list::-webkit-scrollbar-thumb { background: var(--steel-100); border-radius: 99px; }
.msg {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px 22px; box-shadow: var(--shadow-sm);
}
.msg__head { display: flex; align-items: center; gap: 12px; margin-bottom: 12px; }
.msg__avatar {
  width: 38px; height: 38px; border-radius: 50%; flex-shrink: 0; display: grid; place-items: center;
  font-weight: 700; color: #fff; font-size: 15px; background: var(--navy-600);
}
.msg__meta b { display: block; font-size: 14.6px; }
.msg__meta small { color: var(--steel-300); font-size: 12.4px; }
.msg__body { font-size: 14.8px; color: #33475a; white-space: pre-wrap; word-break: break-word; }
.msg__tag {
  margin-left: auto; font-size: 11.6px; padding: 3px 10px; border-radius: 999px;
  background: var(--amber-100); color: #8a5c0c; font-weight: 700;
}
.msg__reply {
  margin-top: 14px; padding: 13px 16px; background: #f4f8fc;
  border-left: 3px solid var(--navy-600); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 14.2px; color: #2b4257;
}
.msg__reply b { color: var(--navy-700); }
.board__empty { text-align: center; color: var(--steel-300); padding: 40px 0; font-size: 14.6px; }

/* ---------- 联系 ---------- */
.contact { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.contact__item { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 30px 28px; box-shadow: var(--shadow-sm); }
.contact__item .ico {
  width: 44px; height: 44px; border-radius: 12px; background: var(--amber-100);
  display: grid; place-items: center; margin-bottom: 16px; color: var(--amber-500);
}
.contact__item small { color: var(--steel-300); font-size: 12.6px; letter-spacing: .12em; text-transform: uppercase; }
.contact__item b { display: block; font-size: 16.6px; margin-top: 6px; line-height: 1.6; }
.contact__item .placeholder { color: var(--steel-300); font-weight: 500; font-size: 14px; }

/* ---------- 页脚 ---------- */
.footer { background: var(--navy-900); color: #9db4cb; padding: 62px 0 26px; font-size: 14.2px; }
.footer__grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 34px; padding-bottom: 34px; border-bottom: 1px solid rgba(255, 255, 255, .1); }
.footer h4 { color: #fff; font-size: 15.4px; margin-bottom: 16px; }
.footer a:hover { color: var(--amber-400); }
.footer ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 10px; }
.footer__bottom { padding-top: 22px; display: flex; flex-wrap: wrap; gap: 12px; justify-content: space-between; font-size: 13px; color: #7b93ab; }

/* ---------- 弹窗 ---------- */
.modal {
  position: fixed; inset: 0; z-index: 100; display: none;
  align-items: center; justify-content: center; padding: 24px;
  background: rgba(4, 16, 30, .68); backdrop-filter: blur(4px);
}
.modal.is-open { display: flex; }
.modal__box {
  background: #fff; border-radius: 18px; width: min(560px, 100%);
  max-height: 88vh; overflow-y: auto; box-shadow: var(--shadow-lg);
  animation: pop .26s ease;
}
.modal__box--wide { width: min(880px, 100%); }
@keyframes pop { from { opacity: 0; transform: translateY(14px) scale(.985); } to { opacity: 1; transform: none; } }
.modal__head { display: flex; align-items: flex-start; gap: 16px; padding: 28px 30px 16px; }
.modal__head h3 { font-size: 21px; }
.modal__head p { color: var(--ink-soft); font-size: 13.8px; margin-top: 6px; }
.modal__close {
  margin-left: auto; background: var(--bg); border: 0; width: 34px; height: 34px; border-radius: 50%;
  cursor: pointer; color: var(--ink-soft); font-size: 19px; line-height: 1; flex-shrink: 0;
}
.modal__close:hover { background: var(--steel-100); }
.modal__body { padding: 0 30px 30px; }
.tabs { display: flex; gap: 6px; padding: 0 30px; border-bottom: 1px solid var(--line); margin-bottom: 22px; }
.tab {
  padding: 11px 4px; margin-right: 20px; border: 0; background: none; cursor: pointer; font-weight: 700;
  color: var(--steel-300); border-bottom: 2px solid transparent; font-size: 15px;
}
.tab.is-active { color: var(--navy-800); border-bottom-color: var(--amber-500); }

/* ---------- 个人中心 ---------- */
.center__row { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 16px 18px; margin-bottom: 12px; }
.center__row h5 { margin: 0 0 6px; font-size: 15px; }
.center__row small { color: var(--steel-300); font-size: 12.4px; }
.center__row .mono { font-family: ui-monospace, Consolas, monospace; color: var(--navy-600); }
.status { font-size: 11.8px; padding: 3px 10px; border-radius: 999px; font-weight: 700; }
.status--new { background: #e8f2ff; color: #1a5490; }
.status--done { background: #e6f6ec; color: #1d7a45; }
.status--hidden { background: #f0f2f5; color: #6b7885; }

/* ---------- 灯箱 ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 120; display: none; align-items: center; justify-content: center;
  background: rgba(3, 12, 22, .93); padding: 40px;
}
.lightbox.is-open { display: flex; }
.lightbox img { max-width: 92vw; max-height: 82vh; border-radius: 10px; box-shadow: var(--shadow-lg); }
.lightbox__cap { position: absolute; bottom: 34px; left: 0; right: 0; text-align: center; color: #cfe0ef; font-size: 14px; }
.lightbox__close, .lightbox__prev, .lightbox__next {
  position: absolute; background: rgba(255, 255, 255, .14); border: 0; color: #fff;
  width: 44px; height: 44px; border-radius: 50%; cursor: pointer; font-size: 20px;
}
.lightbox__close { top: 26px; right: 30px; }
.lightbox__prev { left: 30px; top: 50%; transform: translateY(-50%); }
.lightbox__next { right: 30px; top: 50%; transform: translateY(-50%); }
.lightbox button:hover { background: rgba(255, 255, 255, .28); }

/* ---------- 提示条 ---------- */
.toast-host { position: fixed; top: 84px; right: 22px; z-index: 200; display: grid; gap: 10px; }
.toast {
  background: #fff; border-left: 4px solid var(--amber-500); border-radius: 10px;
  padding: 13px 20px; box-shadow: var(--shadow); font-size: 14.4px; min-width: 250px;
  animation: slideIn .26s ease;
}
.toast--ok { border-left-color: #2f9e5b; }
.toast--err { border-left-color: #d64545; }
@keyframes slideIn { from { opacity: 0; transform: translateX(20px); } to { opacity: 1; transform: none; } }

/* ---------- 滚动显现（仅在 JS 可用时启用，避免脚本失效导致内容不可见） ---------- */
html.js .reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
html.js .reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html.js .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1080px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .flow { grid-template-columns: repeat(3, 1fr); }
  .footer__grid { grid-template-columns: repeat(2, 1fr); }
  .guarantee { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  .nav {
    position: fixed; top: 70px; left: 0; right: 0; background: var(--navy-900);
    flex-direction: column; padding: 14px; gap: 2px; display: none;
    border-bottom: 1px solid rgba(255, 255, 255, .1);
  }
  .nav.is-open { display: flex; }
  .nav a { padding: 12px 14px; }
  .burger { display: block; margin-left: auto; }
  .header__actions .btn span.long { display: none; }
  .about, .split, .board { grid-template-columns: 1fr; gap: 32px; }
  .biz__item, .case__top { grid-template-columns: 1fr; }
  .biz__item:nth-child(even) .biz__media { order: 0; }
  .case__gallery { grid-template-columns: repeat(2, 1fr); }
  .hero__stats { grid-template-columns: repeat(2, 1fr); }
  .grid--3, .contact, .guarantee { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr 1fr; }
  .section { padding: 66px 0; }
  .panel-form { padding: 28px 22px; }
  .wrap { width: calc(100% - 32px); }
}
@media (max-width: 620px) {
  .form-grid { grid-template-columns: 1fr; }
  .grid--2, .grid--4, .about__facts, .flow, .case__gallery { grid-template-columns: 1fr; }
  .hero { padding-top: 118px; }
  .hero__stats div { padding: 16px 18px; }
  .modal__box { border-radius: 14px; }
  .modal__head, .modal__body, .tabs { padding-left: 20px; padding-right: 20px; }
  .toast-host { left: 16px; right: 16px; }
}