/* ==========================================================================
   叠石园林 · 前台样式
   移动端优先（Mobile First）：默认样式即手机样式，
   再通过 min-width 媒体查询逐级增强到平板 / 桌面。
   断点：576(大屏手机) / 768(平板) / 992(桌面) / 1200(宽屏)
   ========================================================================== */

/* ---------- 设计变量 ---------- */
:root {
  --c-primary: #2f6b4f;
  --c-primary-dark: #23523c;
  --c-primary-soft: #eaf2ed;
  --c-accent: #b8873b;
  --c-accent-soft: #faf3e6;
  --c-ink: #1e2b25;
  --c-text: #3d4a44;
  --c-muted: #7d8a83;
  --c-bg: #f7f6f2;
  --c-card: #ffffff;
  --c-line: #e6e3da;

  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 6px 24px rgba(30, 43, 37, .08);
  --shadow-lg: 0 14px 40px rgba(30, 43, 37, .14);

  --header-h: 56px;
  --actionbar-h: 52px;
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-t: env(safe-area-inset-top, 0px);
  --container: 1200px;
  --gap: 14px;

  --font-serif: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
               "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  /* 移动端锚点跳转时留出固定头部高度 */
  scroll-padding-top: calc(var(--header-h) + 12px);
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-text);
  background: var(--c-bg);
  /* 为底部固定操作条留位置（仅移动端显示，桌面端由媒体查询取消） */
  padding-bottom: calc(var(--actionbar-h) + var(--safe-b));
  /* 关键：杜绝任何元素把页面撑出横向滚动条 */
  overflow-x: hidden;
}

h1, h2, h3, h4, h5 { margin: 0 0 .5em; color: var(--c-ink); font-weight: 700; line-height: 1.35; }
p { margin: 0 0 1em; }
a { color: var(--c-primary); text-decoration: none; -webkit-tap-highlight-color: transparent; }
ul, ol { margin: 0; padding: 0; list-style: none; }

img { max-width: 100%; height: auto; display: block; border: 0; }

/* 触控目标不小于 44px */
button, .btn, input, select, textarea { font-family: inherit; font-size: 15px; }
button { cursor: pointer; }

/* ---------- 布局容器 ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 16px; }

.section { padding: 34px 0; }
.section--tight { padding: 22px 0; }
.section--gray { background: #fff; }
.section--paper {
  background:
    linear-gradient(180deg, rgba(47, 107, 79, .04), rgba(47, 107, 79, 0) 40%),
    var(--c-bg);
}

/* 栅格：手机 1 列 → 576 起 2 列 → 992 起按 data-cols 指定列数 */
.grid { display: grid; gap: var(--gap); grid-template-columns: minmax(0, 1fr); }
/* 栅格项一律允许收缩，避免卡片里的长英文 / 长地址把列顶宽 */
.grid > * { min-width: 0; }

/* ---------- 区块标题 ---------- */
.sec-head { text-align: center; margin-bottom: 22px; }
.eyebrow {
  display: inline-block; font-size: 12px; letter-spacing: 3px;
  color: var(--c-accent); margin-bottom: 6px;
}
.sec-head .eyebrow { margin-bottom: 6px; }
.sec-head h2 { font-family: var(--font-serif); font-size: 22px; margin-bottom: 6px; }
.sec-head p { color: var(--c-muted); font-size: 13px; margin: 0; }
.sec-head .rule {
  width: 44px; height: 3px; margin: 10px auto 0; border-radius: 2px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-accent));
}
.sec-head--left { text-align: left; }
.sec-head--left .rule { margin-left: 0; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  min-height: 44px; padding: 0 18px; border-radius: 999px; border: 1px solid transparent;
  font-size: 15px; font-weight: 600; line-height: 1; white-space: nowrap;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
}
.btn:active { transform: scale(.97); }
.btn--primary { background: var(--c-primary); color: #fff; box-shadow: 0 6px 16px rgba(47, 107, 79, .28); }
.btn--primary:hover { background: var(--c-primary-dark); }
.btn--accent { background: var(--c-accent); color: #fff; box-shadow: 0 6px 16px rgba(184, 135, 59, .3); }
.btn--ghost { background: rgba(255, 255, 255, .14); color: #fff; border-color: rgba(255, 255, 255, .6); backdrop-filter: blur(4px); }
.btn--outline { background: #fff; color: var(--c-primary); border-color: var(--c-primary); }
.btn--block { width: 100%; }
.btn--sm { min-height: 36px; padding: 0 14px; font-size: 13px; }
.btn[disabled] { opacity: .55; pointer-events: none; }

/* ---------- 顶部导航 ---------- */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 900;
  height: calc(var(--header-h) + var(--safe-t));
  padding-top: var(--safe-t);
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--c-line);
  transition: box-shadow .25s ease, background .25s ease;
}
.header.is-scrolled { box-shadow: 0 4px 18px rgba(30, 43, 37, .1); }
.header__inner {
  height: var(--header-h); display: flex; align-items: center; gap: 10px;
}
.brand { display: flex; align-items: center; gap: 9px; min-width: 0; }
.brand__mark {
  width: 34px; height: 34px; flex: 0 0 34px; border-radius: 9px;
  background: linear-gradient(145deg, var(--c-primary), #4d8f6c);
  color: #fff; display: grid; place-items: center;
  font-family: var(--font-serif); font-size: 18px; font-weight: 700;
}
.brand__text { min-width: 0; }
.brand__name {
  display: block; font-family: var(--font-serif); font-size: 17px; font-weight: 700;
  color: var(--c-ink); line-height: 1.2; white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis;
}
.brand__sub { display: block; font-size: 10px; color: var(--c-muted); letter-spacing: 1px; }

.header__spacer { flex: 1 1 auto; }

.header__tel {
  display: none; align-items: center; gap: 6px; color: var(--c-primary);
  font-weight: 700; font-size: 15px;
}

/* 汉堡按钮（移动端） */
.nav-toggle {
  width: 44px; height: 44px; display: grid; place-items: center;
  background: none; border: 0; padding: 0;
}
.nav-toggle span {
  display: block; width: 20px; height: 2px; background: var(--c-ink);
  border-radius: 2px; position: relative; transition: background .2s;
}
.nav-toggle span::before, .nav-toggle span::after {
  content: ""; position: absolute; left: 0; width: 20px; height: 2px;
  background: var(--c-ink); border-radius: 2px; transition: transform .25s ease;
}
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }
body.nav-open .nav-toggle span { background: transparent; }
body.nav-open .nav-toggle span::before { transform: translateY(6px) rotate(45deg); }
body.nav-open .nav-toggle span::after { transform: translateY(-6px) rotate(-45deg); }

/* 抽屉式导航（移动端默认） */
.nav {
  position: fixed; top: calc(var(--header-h) + var(--safe-t)); right: 0; bottom: 0;
  width: min(78vw, 300px); z-index: 890;
  background: #fff; border-left: 1px solid var(--c-line);
  padding: 14px 16px calc(20px + var(--safe-b));
  overflow-y: auto; -webkit-overflow-scrolling: touch;
  transform: translateX(100%); transition: transform .28s ease;
  box-shadow: var(--shadow-lg);
}
body.nav-open .nav { transform: translateX(0); }
.nav__list { display: flex; flex-direction: column; gap: 2px; }
.nav__link {
  display: flex; align-items: center; justify-content: space-between;
  min-height: 48px; padding: 0 10px; border-radius: var(--radius-sm);
  color: var(--c-text); font-size: 16px; font-weight: 500;
}
.nav__link:hover, .nav__link.is-active { background: var(--c-primary-soft); color: var(--c-primary); font-weight: 700; }
.nav__link small { font-size: 11px; color: var(--c-muted); }
.nav__foot { margin-top: 18px; padding-top: 16px; border-top: 1px dashed var(--c-line); }
.nav__foot .btn { margin-bottom: 10px; }
.nav__tel { text-align: center; font-size: 13px; color: var(--c-muted); }
.nav__tel b { display: block; font-size: 18px; color: var(--c-primary); letter-spacing: .5px; }

.nav-mask {
  position: fixed; inset: 0; z-index: 880; background: rgba(20, 30, 25, .45);
  opacity: 0; visibility: hidden; transition: opacity .25s ease, visibility .25s;
}
body.nav-open .nav-mask { opacity: 1; visibility: visible; }

/* 主体留出固定头部高度 */
.main { padding-top: calc(var(--header-h) + var(--safe-t)); min-height: 60vh; }

/* ---------- 轮播 ---------- */
.hero { position: relative; background: #16211c; overflow: hidden; }
.hero__track { display: flex; transition: transform .5s cubic-bezier(.4, 0, .2, 1); will-change: transform; }
.hero__slide { position: relative; flex: 0 0 100%; min-width: 100%; }
.hero__img {
  width: 100%;
  /* 移动端偏竖一点，保证主图有足够视觉高度 */
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.hero__shade {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(10, 20, 15, .55) 0%, rgba(10, 20, 15, .18) 40%, rgba(10, 20, 15, .72) 100%);
}
.hero__body {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 18px 16px 22px; color: #fff;
}
.hero__tag {
  display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: 11px;
  letter-spacing: 2px; background: rgba(255, 255, 255, .18); border: 1px solid rgba(255, 255, 255, .35);
  margin-bottom: 10px;
}
.hero__title {
  font-family: var(--font-serif); color: #fff; font-size: 24px; line-height: 1.3;
  margin-bottom: 6px; text-shadow: 0 2px 12px rgba(0, 0, 0, .45);
}
.hero__sub { font-size: 13px; opacity: .92; margin: 0 0 14px; text-shadow: 0 1px 8px rgba(0, 0, 0, .5); }
.hero__cta { display: flex; gap: 10px; flex-wrap: wrap; }

.hero__dots {
  position: absolute; right: 14px; bottom: 14px; display: flex; gap: 6px; z-index: 3;
}
.hero__dot {
  width: 7px; height: 7px; border-radius: 999px; border: 0; padding: 0;
  background: rgba(255, 255, 255, .5); transition: width .25s, background .25s;
}
.hero__dot.is-active { width: 20px; background: #fff; }

.hero__arrow {
  position: absolute; top: 50%; transform: translateY(-50%); z-index: 3;
  width: 38px; height: 38px; border-radius: 50%; border: 0; display: none;
  background: rgba(255, 255, 255, .22); color: #fff; font-size: 18px; line-height: 1;
  backdrop-filter: blur(4px);
}
.hero__arrow--prev { left: 14px; }
.hero__arrow--next { right: 14px; }

/* ---------- 数据条 ---------- */
.stats { background: var(--c-primary); color: #fff; padding: 18px 0; }
.stats__grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px 8px; }
.stat { text-align: center; }
.stat__num {
  font-family: var(--font-serif); font-size: 26px; font-weight: 700; line-height: 1.1;
  color: #fff;
}
.stat__num i { font-style: normal; font-size: 13px; margin-left: 3px; opacity: .85; }
.stat__label { font-size: 12px; opacity: .85; margin-top: 2px; }
.stat--live .stat__num { color: #ffe3ab; }
.stat--live .stat__label::after { content: " · 实时"; font-size: 10px; opacity: .7; }

/* ---------- 卡片 ---------- */
.card {
  background: var(--c-card); border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow); border: 1px solid rgba(230, 227, 218, .8);
}

/* 优势卡片 */
.adv { padding: 20px 18px; text-align: center; }
.adv__icon {
  width: 52px; height: 52px; margin: 0 auto 12px; border-radius: 14px;
  display: grid; place-items: center; font-size: 24px;
  background: var(--c-primary-soft); color: var(--c-primary);
}
.adv h3 { font-size: 16px; margin-bottom: 6px; }
.adv p { font-size: 13px; color: var(--c-muted); margin: 0; }

/* 案例卡片 */
.case-card { display: flex; flex-direction: column; height: 100%; transition: transform .25s ease, box-shadow .25s ease; }
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.case-card__media { position: relative; aspect-ratio: 4 / 3; background: #e8e6df; overflow: hidden; }
.case-card__media img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.case-card:hover .case-card__media img { transform: scale(1.06); }
.case-card__badge {
  position: absolute; left: 10px; top: 10px; padding: 3px 9px; border-radius: 999px;
  font-size: 11px; color: #fff; background: rgba(30, 43, 37, .62); backdrop-filter: blur(4px);
}
.case-card__rec {
  position: absolute; right: 10px; top: 10px; padding: 3px 9px; border-radius: 999px;
  font-size: 11px; color: #fff; background: var(--c-accent);
}
.case-card__body { padding: 13px 14px 15px; display: flex; flex-direction: column; flex: 1 1 auto; }
.case-card__title {
  font-size: 15px; font-weight: 700; color: var(--c-ink); margin-bottom: 6px; line-height: 1.45;
  /* 两行截断 */
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.case-card__desc {
  font-size: 12.5px; color: var(--c-muted); margin-bottom: 10px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.case-card__meta {
  margin-top: auto; padding-top: 10px; border-top: 1px dashed var(--c-line);
  display: flex; flex-wrap: wrap; gap: 6px 12px; font-size: 11.5px; color: var(--c-muted);
}
.case-card__meta b { color: var(--c-text); font-weight: 600; }

/* ---------- 分类标签（可横向滚动，移动端友好） ---------- */
.tabs {
  display: flex; gap: 8px; overflow-x: auto; padding: 2px 16px 10px;
  -webkit-overflow-scrolling: touch; scrollbar-width: none;
  /* 让滚动区贴到屏幕边缘 */
  margin: 0 -16px;
}
.tabs::-webkit-scrollbar { display: none; }
.tab {
  flex: 0 0 auto; min-height: 36px; padding: 0 15px; border-radius: 999px;
  border: 1px solid var(--c-line); background: #fff; color: var(--c-text);
  font-size: 13.5px; display: inline-flex; align-items: center; gap: 5px;
}
.tab i { font-style: normal; font-size: 11px; color: var(--c-muted); }
.tab.is-active { background: var(--c-primary); border-color: var(--c-primary); color: #fff; }
.tab.is-active i { color: rgba(255, 255, 255, .8); }

/* ---------- 服务流程 ---------- */
.process { counter-reset: step; }
.process__item {
  position: relative; background: #fff; border-radius: var(--radius);
  padding: 16px 16px 16px 58px; box-shadow: var(--shadow); border: 1px solid rgba(230, 227, 218, .8);
}
.process__no {
  position: absolute; left: 14px; top: 16px; width: 32px; height: 32px; border-radius: 50%;
  display: grid; place-items: center; font-family: var(--font-serif); font-weight: 700;
  background: var(--c-primary-soft); color: var(--c-primary); font-size: 15px;
}
.process__item h4 { font-size: 15px; margin-bottom: 3px; }
.process__item p { font-size: 12.5px; color: var(--c-muted); margin: 0; }
.process__dur {
  display: inline-block; margin-top: 7px; padding: 2px 8px; border-radius: 999px;
  font-size: 11px; background: var(--c-accent-soft); color: var(--c-accent);
}
/* 移动端：单列竖向时间轴，带连接线 */
.process--timeline { display: grid; gap: 12px; grid-template-columns: minmax(0, 1fr); }
.process--timeline .process__item::before {
  content: ""; position: absolute; left: 29px; top: 48px; bottom: -12px; width: 2px;
  background: linear-gradient(180deg, var(--c-primary-soft), transparent);
}
.process--timeline .process__item:last-child::before { display: none; }

/* ---------- 关于 ---------- */
.about-box { display: grid; gap: 20px; align-items: center; }
.about-box__media { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.about-box__media img { aspect-ratio: 4 / 3; object-fit: cover; width: 100%; }
.about-box h2 { font-family: var(--font-serif); font-size: 21px; }
.about-box .lead { font-size: 14px; color: var(--c-text); }
.about-box__honors { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 18px; }
.honor-tag {
  padding: 5px 11px; border-radius: 999px; font-size: 12px;
  background: var(--c-primary-soft); color: var(--c-primary-dark); border: 1px solid rgba(47, 107, 79, .16);
}
.about-nums { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin-top: 6px; }
.about-num { text-align: center; padding: 12px 6px; background: #fff; border-radius: var(--radius-sm); border: 1px solid var(--c-line); }
.about-num b { display: block; font-family: var(--font-serif); font-size: 20px; color: var(--c-primary); }
.about-num span { font-size: 11.5px; color: var(--c-muted); }

/* ---------- 留言表单 ---------- */
.msg-wrap { display: grid; gap: 18px; }
.msg-info { padding: 20px 18px; background: var(--c-primary); color: #fff; border-radius: var(--radius); }
.msg-info h3 { color: #fff; font-family: var(--font-serif); font-size: 19px; }
.msg-info p { font-size: 13px; opacity: .9; }
.msg-info__list { margin-top: 14px; display: grid; gap: 10px; }
.msg-info__list li { display: flex; gap: 9px; align-items: flex-start; font-size: 13px; }
.msg-info__list li b { font-weight: 600; }
.msg-info__list .ico { flex: 0 0 20px; text-align: center; opacity: .9; }
.msg-info__hotline {
  margin-top: 16px; padding-top: 14px; border-top: 1px solid rgba(255, 255, 255, .25);
  font-size: 12px; opacity: .85;
}
.msg-info__hotline a { display: block; font-size: 24px; font-weight: 700; color: #ffe3ab; letter-spacing: 1px; }

.form { background: #fff; border-radius: var(--radius); padding: 18px 16px; box-shadow: var(--shadow); }
.field { margin-bottom: 14px; }
.field > label { display: block; font-size: 13px; font-weight: 600; color: var(--c-ink); margin-bottom: 6px; }
.field > label em { color: #d9534f; font-style: normal; margin-left: 2px; }
.field .hint { font-size: 11.5px; color: var(--c-muted); margin-top: 5px; }
.input, .textarea, .select {
  /* min-width:0 —— 表单控件放进栅格时，默认最小宽度是 intrinsic size，
     会把列顶宽导致整页横滚，必须显式允许收缩 */
  width: 100%; min-width: 0; min-height: 46px; padding: 11px 13px; border-radius: var(--radius-sm);
  border: 1px solid var(--c-line); background: #fcfcfa; color: var(--c-ink);
  transition: border-color .2s, box-shadow .2s; -webkit-appearance: none; appearance: none;
}
.textarea { min-height: 96px; resize: vertical; line-height: 1.6; }
.select {
  background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%237d8a83' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 13px center; padding-right: 32px;
}
.input:focus, .textarea:focus, .select:focus {
  outline: 0; border-color: var(--c-primary); background: #fff;
  box-shadow: 0 0 0 3px rgba(47, 107, 79, .12);
}
.input.is-error, .textarea.is-error { border-color: #d9534f; background: #fffafa; }
.field__err { display: none; font-size: 11.5px; color: #d9534f; margin-top: 5px; }
.field.has-error .field__err { display: block; }
.form__row { display: grid; gap: 0 14px; }
/* 蜜罐字段：真人看不见 */
.hp-field { position: absolute !important; left: -9999px !important; width: 1px; height: 1px; overflow: hidden; }
.form__foot { display: flex; flex-direction: column; gap: 10px; align-items: stretch; }
.form__note { font-size: 11.5px; color: var(--c-muted); text-align: center; }

.promise-bar { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 16px; }
.promise {
  padding: 6px 12px; border-radius: 999px; background: #fff; border: 1px solid var(--c-line);
  font-size: 12.5px; color: var(--c-primary-dark);
}

/* ---------- 联系方式条 ---------- */
.contact-strip { display: grid; gap: 12px; }
.contact-item {
  display: flex; gap: 12px; align-items: center; background: #fff;
  border-radius: var(--radius); padding: 14px; box-shadow: var(--shadow);
}
.contact-item__ico {
  flex: 0 0 42px; width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center;
  background: var(--c-primary-soft); color: var(--c-primary); font-size: 19px;
}
.contact-item__body { min-width: 0; }
.contact-item__body span { display: block; font-size: 11.5px; color: var(--c-muted); }
.contact-item__body b {
  display: block; font-size: 15px; color: var(--c-ink); word-break: break-all;
}

/* ---------- 页脚 ---------- */
.footer { background: #1b2620; color: #b9c6bf; padding: 30px 0 20px; font-size: 13px; }
.footer__grid { display: grid; gap: 24px; }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 12px; font-family: var(--font-serif); }
.footer a { color: #b9c6bf; }
.footer a:hover { color: #fff; }
.footer__list { display: grid; gap: 8px; }
.footer__list li { display: flex; gap: 8px; }
.footer__list li i { font-style: normal; color: var(--c-accent); flex: 0 0 auto; }
.footer__nav { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px 12px; }
.footer__brand { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.footer__brand .brand__mark { background: linear-gradient(145deg, #4d8f6c, var(--c-primary)); }
.footer__brand .brand__name { color: #fff; }
.footer__desc { line-height: 1.8; opacity: .82; }
.footer__bottom {
  margin-top: 24px; padding-top: 16px; border-top: 1px solid rgba(255, 255, 255, .1);
  text-align: center; font-size: 12px; opacity: .7; line-height: 1.9;
}
.footer__qr { display: flex; gap: 12px; }
.footer__qr div { text-align: center; font-size: 11px; }
.qr-box {
  width: 88px; height: 88px; border-radius: 10px; background: #fff; color: #1b2620;
  display: grid; place-items: center; font-size: 11px; text-align: center; padding: 6px; line-height: 1.4;
}

/* ---------- 移动端底部固定操作条 ---------- */
.actionbar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 870;
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.2fr); gap: 1px;
  background: var(--c-line);
  padding-bottom: var(--safe-b);
  box-shadow: 0 -4px 18px rgba(30, 43, 37, .12);
}
.actionbar a, .actionbar button {
  min-height: var(--actionbar-h); display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 1px; background: #fff; border: 0; color: var(--c-text);
  font-size: 11px; padding: 4px 0;
}
.actionbar .ico { font-size: 17px; line-height: 1; }
.actionbar a:active, .actionbar button:active { background: var(--c-primary-soft); }
.actionbar .is-primary { background: var(--c-primary); color: #fff; }
.actionbar .is-primary:active { background: var(--c-primary-dark); }

/* 返回顶部 */
.to-top {
  position: fixed; right: 12px; z-index: 860;
  bottom: calc(var(--actionbar-h) + var(--safe-b) + 14px);
  width: 42px; height: 42px; border-radius: 50%; border: 0;
  background: rgba(255, 255, 255, .94); color: var(--c-primary); box-shadow: var(--shadow);
  font-size: 17px; opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity .25s, transform .25s, visibility .25s;
}
.to-top.is-show { opacity: 1; visibility: visible; transform: translateY(0); }

/* ---------- 提示 / 加载 ---------- */
.toast-box {
  position: fixed; left: 50%; top: calc(var(--header-h) + var(--safe-t) + 16px); z-index: 1200;
  transform: translateX(-50%); display: grid; gap: 8px; width: max-content; max-width: 88vw;
}
.toast {
  padding: 11px 18px; border-radius: 999px; background: rgba(30, 43, 37, .92); color: #fff;
  font-size: 13.5px; box-shadow: var(--shadow-lg); animation: toast-in .25s ease;
  max-width: 88vw; text-align: center;
}
.toast--ok { background: rgba(47, 107, 79, .95); }
.toast--err { background: rgba(193, 74, 62, .95); }
@keyframes toast-in { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: none; } }

.loading-box { padding: 46px 0; text-align: center; color: var(--c-muted); font-size: 13px; }
.spinner {
  width: 26px; height: 26px; margin: 0 auto 12px; border-radius: 50%;
  border: 2.5px solid var(--c-line); border-top-color: var(--c-primary);
  animation: spin .8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.empty {
  padding: 50px 20px; text-align: center; color: var(--c-muted); font-size: 13.5px;
  background: #fff; border-radius: var(--radius); border: 1px dashed var(--c-line);
}
.empty .ico { font-size: 34px; display: block; margin-bottom: 8px; opacity: .5; }

/* 骨架屏 */
.skel { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.skel__media { aspect-ratio: 4 / 3; background: linear-gradient(90deg, #eee 25%, #f5f5f5 37%, #eee 63%); background-size: 400% 100%; animation: skel 1.3s ease infinite; }
.skel__line { height: 12px; margin: 12px 14px; border-radius: 6px; background: linear-gradient(90deg, #eee 25%, #f5f5f5 37%, #eee 63%); background-size: 400% 100%; animation: skel 1.3s ease infinite; }
.skel__line.w60 { width: 60%; }
@keyframes skel { 0% { background-position: 100% 50%; } 100% { background-position: 0 50%; } }

/* ---------- 分页 ---------- */
.pager { display: flex; gap: 8px; justify-content: center; align-items: center; flex-wrap: wrap; margin-top: 24px; }
.pager button {
  min-width: 40px; min-height: 40px; padding: 0 12px; border-radius: 10px;
  border: 1px solid var(--c-line); background: #fff; color: var(--c-text); font-size: 14px;
}
.pager button.is-active { background: var(--c-primary); border-color: var(--c-primary); color: #fff; font-weight: 700; }
.pager button[disabled] { opacity: .45; pointer-events: none; }
.pager__info { font-size: 12.5px; color: var(--c-muted); width: 100%; text-align: center; margin-top: 4px; }

/* ---------- 内页横幅 ---------- */
.page-hero {
  position: relative; height: 190px; overflow: hidden;
  background: linear-gradient(135deg, #1d2f26, #2f6b4f 65%, #4d8f6c);
  display: flex; align-items: flex-end;
}
.page-hero img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.page-hero__shade { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(12, 22, 17, .35), rgba(12, 22, 17, .78)); }
.page-hero__body { position: relative; padding: 0 16px 20px; color: #fff; width: 100%; }
.page-hero h1 { color: #fff; font-family: var(--font-serif); font-size: 23px; margin-bottom: 4px; }
.page-hero p { font-size: 12.5px; opacity: .88; margin: 0; }
.crumb { font-size: 11.5px; margin-bottom: 8px; color: var(--c-muted); }
.crumb a { color: var(--c-primary); }
.crumb a:hover { text-decoration: underline; }
.crumb span { color: inherit; }
/* 深色横幅里的面包屑反白 */
.page-hero .crumb { opacity: .82; color: #fff; }
.page-hero .crumb a { color: #ffe3ab; }

/* ---------- 案例详情 ---------- */
/* 列宽必须写 minmax(0, 1fr)：裸 1fr 等于 minmax(auto,1fr)，自动最小尺寸取 min-content，
   而缩略图条里全是 flex:0 0 auto 不换行的图片，min-content = 所有缩略图宽度之和，
   网格轨道会被内容顶宽，overflow-x:auto 永不触发，最终把整页撑出横向滚动。 */
.detail { display: grid; gap: 20px; grid-template-columns: minmax(0, 1fr); }
.detail > * { min-width: 0; }
.detail__gallery {
  border-radius: var(--radius); overflow: hidden; background: #fff; box-shadow: var(--shadow);
  min-width: 0; max-width: 100%;
}
.detail__main-img { aspect-ratio: 4 / 3; width: 100%; object-fit: cover; background: #eee; }
.detail__thumbs {
  display: flex; gap: 8px; padding: 10px; overflow-x: auto; -webkit-overflow-scrolling: touch;
  min-width: 0; max-width: 100%;
}
.detail__thumbs img {
  width: 74px; height: 56px; object-fit: cover; border-radius: 7px; flex: 0 0 auto;
  border: 2px solid transparent; opacity: .72;
}
.detail__thumbs img.is-active { border-color: var(--c-primary); opacity: 1; }

.detail__title { font-family: var(--font-serif); font-size: 21px; line-height: 1.4; }
.detail__tags { display: flex; flex-wrap: wrap; gap: 7px; margin: 10px 0 14px; }
.tag {
  padding: 3px 10px; border-radius: 999px; font-size: 11.5px;
  background: var(--c-primary-soft); color: var(--c-primary-dark);
  white-space: nowrap;
}
a.tag:hover { background: var(--c-primary); color: #fff; }
.tag--muted { background: var(--c-bg); color: var(--c-muted); }
.spec {
  display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1px; background: var(--c-line);
  border-radius: var(--radius); overflow: hidden; border: 1px solid var(--c-line);
}
.spec__item { background: #fff; padding: 11px 13px; }
.spec__item span { display: block; font-size: 11.5px; color: var(--c-muted); margin-bottom: 2px; }
.spec__item b { font-size: 13.5px; color: var(--c-ink); font-weight: 600; word-break: break-all; }

.richtext { font-size: 15px; line-height: 1.95; color: var(--c-text); }
.richtext p { margin-bottom: 1.05em; }
.richtext img { border-radius: var(--radius-sm); margin: 12px 0; max-width: 100%; height: auto; }
.richtext h2, .richtext h3 { font-family: var(--font-serif); margin: 1.3em 0 .6em; font-size: 17px; }
.richtext__lead {
  font-size: 14.5px; line-height: 1.85; color: var(--c-text);
  background: var(--c-primary-soft); border-left: 3px solid var(--c-primary);
  padding: 11px 13px; border-radius: 0 var(--radius-sm) var(--radius-sm) 0; margin-bottom: 16px;
}

.detail__aside { display: grid; gap: 16px; align-content: start; }
.aside-card { background: #fff; border-radius: var(--radius); padding: 16px; box-shadow: var(--shadow); }
.aside-card h4 {
  font-size: 15px; margin-bottom: 12px; padding-bottom: 9px; border-bottom: 1px solid var(--c-line);
  font-family: var(--font-serif);
}
.aside-case { display: flex; gap: 10px; padding: 9px 0; border-bottom: 1px dashed var(--c-line); }
.aside-case:last-child { border-bottom: 0; padding-bottom: 0; }
.aside-case img { width: 74px; height: 56px; object-fit: cover; border-radius: 7px; flex: 0 0 74px; }
.aside-case b {
  font-size: 13px; color: var(--c-ink); font-weight: 600; line-height: 1.45;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.aside-case span { display: block; min-width: 0; font-size: 11.5px; color: var(--c-muted); }
.aside-case:hover b { color: var(--c-primary); }

.share-bar { display: flex; gap: 10px; flex-wrap: wrap; }

/* ---------- 搜索 / 筛选条 ---------- */
.filter-bar {
  background: #fff; border-radius: var(--radius); padding: 13px; box-shadow: var(--shadow);
  display: grid; gap: 10px; margin-bottom: 16px;
}
.filter-bar__row { display: grid; gap: 10px; grid-template-columns: minmax(0, 1fr); }
.search-box { position: relative; display: flex; gap: 8px; }
.search-box .input { flex: 1 1 auto; min-width: 0; }

/* ==========================================================================
   ≥576px 大屏手机 / 小平板
   ========================================================================== */
@media (min-width: 576px) {
  body { font-size: 15.5px; }
  .container { padding: 0 20px; }
  .grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
  .grid[data-cols="3"], .grid[data-cols="4"] { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .section { padding: 42px 0; }
  .sec-head h2 { font-size: 25px; }
  .hero__img { aspect-ratio: 16 / 9; }
  .hero__title { font-size: 30px; }
  .hero__sub { font-size: 14px; }
  .hero__body { padding: 22px 20px 26px; }
  .stats__grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .form__row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .spec { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .filter-bar__row { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .page-hero { height: 230px; }
  .page-hero h1 { font-size: 27px; }
  /* 流程改为两列 */
  .process--timeline { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .process--timeline .process__item::before { display: none; }
}

/* ==========================================================================
   ≥768px 平板
   ========================================================================== */
@media (min-width: 768px) {
  .grid[data-cols="3"] { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid[data-cols="4"] { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .stats__grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .stat__num { font-size: 30px; }
  .msg-wrap { grid-template-columns: minmax(0, 1fr); }
  .about-box { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 26px; }
  .contact-strip { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .footer__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 28px; }
  /* 流程改为两列 */
  .process--timeline { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
  .process--timeline .process__item::before { display: none; }
  .process__item { padding: 18px 18px 18px 64px; }
  .page-hero { height: 260px; }
  .form { padding: 24px; }
  .form__foot { flex-direction: row; align-items: center; }
  .form__foot .btn { flex: 0 0 auto; min-width: 190px; }
  .form__note { flex: 1 1 auto; text-align: left; }
}

/* ==========================================================================
   ≥992px 桌面
   ========================================================================== */
@media (min-width: 992px) {
  :root { --header-h: 72px; --gap: 20px; }
  body { font-size: 16px; padding-bottom: 0; }   /* 桌面端不需要底部操作条 */
  .container { padding: 0 24px; }
  .section { padding: 58px 0; }

  /* 导航横排显示，隐藏汉堡与抽屉 */
  .nav-toggle { display: none; }
  .nav-mask { display: none; }
  .nav {
    position: static; width: auto; transform: none; box-shadow: none; border: 0;
    background: transparent; padding: 0; overflow: visible; display: flex; align-items: center; gap: 18px;
  }
  .nav__list { flex-direction: row; gap: 4px; }
  .nav__link {
    min-height: 44px; padding: 0 13px; font-size: 15px; border-radius: 999px; justify-content: center;
  }
  .nav__link small { display: none; }
  .nav__foot { display: none; }
  .header__tel { display: inline-flex; }
  .brand__name { font-size: 19px; }
  .brand__mark { width: 38px; height: 38px; flex-basis: 38px; font-size: 20px; }

  .grid[data-cols="3"] { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .grid[data-cols="4"] { grid-template-columns: repeat(4, minmax(0, 1fr)); }

  .hero__img { aspect-ratio: 21 / 9; max-height: 560px; }
  .hero__body { padding: 0 0 54px; }
  .hero__inner { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
  .hero__title { font-size: 42px; }
  .hero__sub { font-size: 16px; max-width: 620px; }
  .hero__tag { font-size: 12px; }
  .hero__arrow { display: grid; place-items: center; }
  .hero__dots { right: auto; left: 50%; transform: translateX(-50%); bottom: 22px; }

  .sec-head h2 { font-size: 30px; }
  .sec-head p { font-size: 14px; }
  .stat__num { font-size: 34px; }

  .msg-wrap { grid-template-columns: 380px minmax(0, 1fr); gap: 26px; align-items: start; }
  .contact-strip { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .footer__grid { grid-template-columns: 1.4fr repeat(3, minmax(0, 1fr)); gap: 34px; }
  .footer { padding: 46px 0 24px; }

  .detail { grid-template-columns: minmax(0, 1fr) 320px; gap: 26px; align-items: start; }
  .detail__main-img { aspect-ratio: 16 / 10; }
  .page-hero { height: 320px; }
  .page-hero h1 { font-size: 34px; }
  .page-hero p { font-size: 14px; }

  /* 桌面端隐藏移动端操作条与返回顶部下移 */
  .actionbar { display: none; }
  .to-top { bottom: 28px; }

  .process--timeline { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .spec { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .filter-bar { padding: 16px; }
  .filter-bar__row { grid-template-columns: minmax(0, 1fr) 200px 160px auto; align-items: center; }
  .about-box h2 { font-size: 26px; }
  .detail__title { font-size: 26px; }
}

/* ==========================================================================
   ≥1200px 宽屏
   ========================================================================== */
@media (min-width: 1200px) {
  .hero__title { font-size: 48px; }
  .grid[data-cols="4"] { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .detail { grid-template-columns: minmax(0, 1fr) 350px; }
}

/* ---------- 降低动效偏好 / 打印 ---------- */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; scroll-behavior: auto !important; }
}

@media print {
  .header, .actionbar, .to-top, .footer, .msg-wrap .msg-info { display: none !important; }
  body { padding-bottom: 0; background: #fff; }
}

/* ---------- 常见问题（留言页） ---------- */
.faq { display: grid; gap: 10px; }
.faq__item { background: #fff; border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.faq__q {
  width: 100%; min-height: 48px; display: flex; align-items: center; gap: 10px;
  padding: 13px 15px; background: none; border: 0; cursor: pointer; text-align: left;
  font-size: 14.5px; font-weight: 600; color: var(--c-ink); font-family: inherit;
}
.faq__q::after {
  content: '+'; margin-left: auto; flex: 0 0 auto; font-size: 19px; font-weight: 400;
  color: var(--c-primary); transition: transform .25s;
}
.faq__item.is-open .faq__q::after { transform: rotate(45deg); }
.faq__a {
  max-height: 0; overflow: hidden; transition: max-height .3s ease;
  font-size: 13.5px; color: var(--c-text); line-height: 1.85;
}
.faq__a > div { padding: 0 15px 15px; border-top: 1px dashed var(--c-line); padding-top: 12px; }
.faq__item.is-open .faq__a { max-height: 420px; }

/* ---------- 提交成功提示 ---------- */
.success-box {
  display: none; text-align: center; padding: 30px 20px; background: var(--c-primary-soft);
  border: 1px solid rgba(47, 107, 79, .2); border-radius: var(--radius);
}
.success-box.is-show { display: block; animation: fade-in .4s ease both; }
.success-box__ico {
  width: 52px; height: 52px; margin: 0 auto 12px; border-radius: 50%; display: grid; place-items: center;
  background: var(--c-primary); color: #fff; font-size: 26px;
}
.success-box h3 { font-family: var(--font-serif); font-size: 18px; margin-bottom: 6px; }
.success-box p { font-size: 13px; color: var(--c-text); margin: 0 0 16px; }

/* ---------- 通用工具类 ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.mt-10 { margin-top: 10px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mb-0 { margin-bottom: 0; }
.muted { color: var(--c-muted); }
.small { font-size: 12.5px; }
.hidden { display: none !important; }
.fade-in { animation: fade-in .45s ease both; }
@keyframes fade-in { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }