/* ==========================================================
   嗨聊助手 · 官方落地页
   配色沿用 App 科技蓝主题：品牌蓝 / 浅蓝底 / 橙点缀
   ========================================================== */

:root {
  --ink:        #1E293B;   /* 深墨 */
  --ink-dark:   #0F172A;
  --ink-soft:   #475569;
  --paper:      #F4F7FD;   /* 宣纸 */
  --paper-deep: #E8EEF9;
  --cinnabar:   #2563EB;   /* 朱砂 */
  --cinnabar-d: #1D4ED8;
  --gold:       #F97316;
  --green:      #16A34A;
  --card:       #FFFFFF;
  --text-sub:   #7A8699;
  --divider:    #E4EAF5;

  --r-sm: 10px;
  --r:    16px;
  --r-lg: 24px;

  --shadow-s: 0 2px 8px rgba(30, 41, 59, .06);
  --shadow-m: 0 8px 28px rgba(30, 41, 59, .09);
  --shadow-l: 0 20px 60px rgba(30, 41, 59, .14);

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

  --maxw: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--ink);
  background-color: var(--paper);
  /* 宣纸颗粒纹理 */
  background-image:
    radial-gradient(1200px 600px at 78% -10%, rgba(37, 99, 235, .07), transparent 62%),
    radial-gradient(900px 500px at 8% 12%, rgba(30, 41, 59, .06), transparent 60%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='.035'/%3E%3C/svg%3E");
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3 { font-family: var(--font-serif); font-weight: 700; letter-spacing: .01em; }
em { font-style: normal; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* ============ 通用组件 ============ */

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-sans);
  font-size: 15px; font-weight: 600;
  padding: 13px 26px;
  border: 1px solid transparent; border-radius: 999px;
  cursor: pointer; transition: .22s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--cinnabar); color: #fff;
  box-shadow: 0 8px 22px rgba(37, 99, 235, .28);
}
.btn-primary:hover { background: var(--cinnabar-d); transform: translateY(-2px); box-shadow: 0 12px 28px rgba(37, 99, 235, .34); }
.btn-ghost { background: transparent; color: var(--ink); border-color: rgba(30, 41, 59, .22); }
.btn-ghost:hover { border-color: var(--ink); background: rgba(30, 41, 59, .04); }
.btn-sm { padding: 9px 18px; font-size: 14px; }
.btn-lg { padding: 16px 38px; font-size: 17px; }

.badge {
  display: inline-block;
  font-size: 13px; letter-spacing: .04em;
  padding: 6px 14px; border-radius: 999px;
  background: rgba(37, 99, 235, .09);
  color: var(--cinnabar);
  border: 1px solid rgba(37, 99, 235, .2);
}

.section { padding: 92px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head h2 { font-size: clamp(26px, 4vw, 38px); margin: 14px 0 12px; }
.section-head p { color: var(--text-sub); margin: 0; font-size: 16px; }
.kicker { font-size: 13px; letter-spacing: .22em; color: var(--cinnabar); font-weight: 600; }

/* 印章式分隔 */
.seal {
  width: 46px; height: 46px; margin: 0 auto 18px;
  border: 2px solid var(--cinnabar); border-radius: 8px;
  color: var(--cinnabar); font-family: var(--font-serif); font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; letter-spacing: .06em; line-height: 1.1; text-align: center;
  opacity: .85;
}

.card {
  background: var(--card);
  border: 1px solid var(--divider);
  border-radius: var(--r);
  box-shadow: var(--shadow-s);
}

/* ============ 导航 ============ */

.nav {
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: saturate(1.4) blur(12px);
  -webkit-backdrop-filter: saturate(1.4) blur(12px);
  background: rgba(246, 242, 233, .82);
  border-bottom: 1px solid var(--divider);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 12px 24px;
  display: flex; align-items: center; gap: 20px;
}
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-serif); font-size: 19px; font-weight: 700; }
.brand img { width: 30px; height: 30px; border-radius: 8px; }
.nav-links { margin-left: auto; display: flex; gap: 26px; font-size: 15px; color: var(--ink-soft); }
.nav-links a { position: relative; padding: 4px 0; }
.nav-links a::after {
  content: ''; position: absolute; left: 0; right: 100%; bottom: 0; height: 2px;
  background: var(--cinnabar); transition: right .25s ease;
}
.nav-links a:hover::after { right: 0; }

/* ============ Hero ============ */

.hero { padding: 64px 0 84px; position: relative; overflow: hidden; }
.hero-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 24px;
  display: grid; grid-template-columns: 1.05fr .95fr; gap: 48px; align-items: center;
}
.hero h1 { font-size: clamp(38px, 6.2vw, 62px); line-height: 1.18; margin: 20px 0 18px; }
.hero h1 .hl { color: var(--cinnabar); position: relative; }
.hero h1 .hl::after {
  content: ''; position: absolute; left: 0; right: 0; bottom: 6px; height: 12px;
  background: rgba(37, 99, 235, .14); z-index: -1; border-radius: 4px;
}
.lead { font-size: 17px; color: var(--ink-soft); max-width: 520px; }
.lead em { color: var(--cinnabar); font-weight: 600; }
.hero-cta { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; margin-top: 30px; }
.hero-meta { font-size: 13px; color: var(--text-sub); }
.hero-trust { display: flex; gap: 20px; flex-wrap: wrap; margin-top: 26px; font-size: 14px; color: var(--green); font-weight: 500; }
.hero-trust span { display: flex; align-items: center; gap: 6px; }

/* ============ 手机 Mockup ============ */

.phone {
  width: 300px; margin: 0 auto; position: relative;
  background: var(--ink-dark); border-radius: 40px;
  padding: 11px; box-shadow: var(--shadow-l);
  border: 1px solid rgba(255, 255, 255, .08);
}
.phone-screen {
  background: var(--paper); border-radius: 30px; overflow: hidden; position: relative;
  aspect-ratio: 9 / 19;
}
.statusbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 8px 16px 4px; font-size: 11px; color: var(--ink); font-weight: 600;
}
.statusbar .dots { display: flex; gap: 3px; align-items: flex-end; }
.statusbar .dots i { width: 3px; background: var(--ink); border-radius: 1px; display: block; opacity: .75; }

/* App 主界面 */
.app-ui { padding: 0 12px 14px; font-size: 11px; }
.app-bar { display: flex; align-items: center; gap: 7px; padding: 4px 0 8px; border-bottom: 1px solid var(--divider); }
.app-bar img { width: 17px; height: 17px; border-radius: 5px; }
.app-bar b { font-family: var(--font-serif); font-size: 14px; }
.app-bar .sp { margin-left: auto; display: flex; gap: 10px; color: var(--text-sub); font-size: 10px; }
.app-bar .sp .logout { color: var(--cinnabar); }
.vip-bar {
  margin: 8px 0 10px; text-align: center; padding: 6px;
  background: #fff; border: 1px solid var(--divider); border-radius: 8px;
  font-size: 11px; font-weight: 600; color: var(--ink);
}
.vip-bar span { color: var(--cinnabar); }
.ui-card {
  background: #fff; border: 1px solid var(--divider); border-radius: 10px;
  padding: 10px; margin-bottom: 9px;
}
.ui-row { display: flex; align-items: center; gap: 8px; }
.ui-row .t { font-weight: 700; font-size: 12px; }
.ui-row .desc { color: var(--text-sub); font-size: 10px; margin-top: 5px; line-height: 1.5; }
.switch { margin-left: auto; width: 30px; height: 17px; border-radius: 999px; background: var(--green); position: relative; flex: none; }
.switch.off { background: #C9C2B6; }
.switch::after {
  content: ''; position: absolute; top: 2px; left: 2px; width: 13px; height: 13px;
  background: #fff; border-radius: 50%; box-shadow: 0 1px 2px rgba(0, 0, 0, .2);
}
.switch.off::after { left: auto; right: 2px; }
.ui-tag { font-size: 10px; color: var(--green); font-weight: 600; margin-top: 6px; }
.ui-tag.red { color: var(--cinnabar); }
.ui-btn {
  display: block; text-align: center; margin-top: 8px; padding: 6px;
  background: var(--ink); color: #fff; border-radius: 7px; font-size: 11px; font-weight: 600;
}
.ui-btn.outline { background: transparent; color: var(--ink); border: 1px solid var(--divider); }
.ui-list-title { color: var(--text-sub); font-size: 10px; margin: 10px 0 6px; }
.contact {
  display: flex; align-items: center; gap: 8px; background: #fff;
  border: 1px solid var(--divider); border-radius: 9px; padding: 8px 10px; margin-bottom: 5px;
}
.avatar { width: 24px; height: 24px; border-radius: 50%; flex: none; display: grid; place-items: center; color: #fff; font-size: 10px; font-weight: 700; }
.lv { margin-left: auto; font-size: 9px; font-weight: 700; padding: 2px 7px; border-radius: 999px; background: rgba(37, 99, 235, .1); color: var(--cinnabar); }
.lv.b { background: rgba(201, 162, 39, .14); color: #8A6D0F; }
.lv.c { background: rgba(63, 122, 84, .12); color: var(--green); }

/* 悬浮窗叠加演示 */
.float-overlay { position: absolute; right: 8px; top: 148px; width: 214px; z-index: 3; }
.float-panel {
  background: #23221F; border: 1px solid rgba(255, 255, 255, .1); border-radius: 12px;
  padding: 10px; box-shadow: 0 12px 30px rgba(0, 0, 0, .4); font-size: 10px;
}
.fp-head { display: flex; align-items: center; gap: 6px; color: #fff; font-weight: 700; font-size: 11px; }
.fp-head .op { margin-left: auto; display: flex; gap: 8px; font-size: 10px; font-weight: 400; }
.fp-head .op i { font-style: normal; color: #FFD166; }
.fp-head .op b { color: #9AA0B5; font-weight: 400; }
.fp-msg {
  margin-top: 8px; background: #1B1A18; border-radius: 8px; padding: 8px;
  color: #C9CDD8; font-size: 9.5px; line-height: 1.65; height: 62px; overflow: hidden;
}
.fp-msg .me { color: #7FB08B; }
.fp-btn {
  margin-top: 8px; text-align: center; padding: 7px; border-radius: 8px;
  background: var(--cinnabar); color: #fff; font-weight: 700; font-size: 11px;
}
.fp-cand {
  margin-top: 6px; background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .1);
  border-radius: 8px; padding: 7px 8px; color: #E8E6E1; font-size: 9.5px; line-height: 1.6;
}
.fp-tip { margin-top: 7px; color: #8A8F9C; font-size: 8.5px; text-align: center; }
.fp-dot {
  position: absolute; right: -4px; bottom: -34px; width: 34px; height: 34px; border-radius: 50%;
  background: var(--ink); color: #fff; display: grid; place-items: center; font-size: 15px;
  box-shadow: 0 6px 16px rgba(0, 0, 0, .35);
}

/* 微信底层界面 */
.wx-top { background: #EDEDED; padding: 7px 12px; text-align: center; font-size: 11px; font-weight: 600; color: #111; border-bottom: 1px solid #DCDCDC; }
.wx-body { background: #EDEDED; padding: 10px; height: calc(100% - 62px); }
.wx-bubble {
  background: #fff; border-radius: 8px; padding: 7px 9px; font-size: 10px; color: #111;
  display: inline-block; max-width: 78%; margin-bottom: 8px; position: relative; line-height: 1.5;
}
.wx-bubble::before {
  content: ''; position: absolute; left: -5px; top: 10px; border: 5px solid transparent;
  border-right-color: #fff; border-left: 0;
}
.wx-bubble.mine { background: #95EC69; margin-left: auto; display: block; }
.wx-bubble.mine::before { left: auto; right: -5px; border-right: 0; border-left-color: #95EC69; }
.wx-input {
  position: absolute; bottom: 0; left: 0; right: 0; background: #F7F7F7;
  border-top: 1px solid #DCDCDC; padding: 8px 10px; display: flex; align-items: center; gap: 8px;
}
.wx-input .box { flex: 1; background: #fff; border-radius: 5px; height: 26px; display: flex; align-items: center; padding: 0 8px; font-size: 10px; color: #999; }
.wx-input .send { background: #07C160; color: #fff; font-size: 10px; padding: 4px 10px; border-radius: 5px; font-weight: 600; }

/* ============ 数据条 ============ */

.stats { border-top: 1px solid var(--divider); border-bottom: 1px solid var(--divider); background: rgba(255, 255, 255, .5); }
.stats-inner { max-width: var(--maxw); margin: 0 auto; padding: 26px 24px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }
.stat b { display: block; font-family: var(--font-serif); font-size: 30px; line-height: 1.2; }
.stat span { font-size: 13px; color: var(--text-sub); }

/* ============ 功能卡 ============ */

.grid { display: grid; gap: 20px; }
.features { grid-template-columns: repeat(3, 1fr); }
.feat { padding: 28px 26px; transition: .25s ease; }
.feat:hover { transform: translateY(-4px); box-shadow: var(--shadow-m); border-color: rgba(37, 99, 235, .28); }
.feat .ico {
  width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center;
  background: rgba(37, 99, 235, .08); color: var(--cinnabar); font-size: 21px; margin-bottom: 16px;
}
.feat h3 { font-size: 19px; margin: 0 0 8px; }
.feat p { margin: 0; color: var(--text-sub); font-size: 14.5px; }

/* ============ 三步流程 ============ */

.steps { grid-template-columns: repeat(3, 1fr); gap: 0; position: relative; }
.step { text-align: center; padding: 0 24px; position: relative; }
.step .n {
  width: 52px; height: 52px; margin: 0 auto 16px; border-radius: 50%;
  background: var(--ink); color: #fff; display: grid; place-items: center;
  font-family: var(--font-serif); font-size: 20px; font-weight: 700;
}
.step h3 { font-size: 18px; margin: 0 0 8px; }
.step p { color: var(--text-sub); font-size: 14.5px; margin: 0; }
.step + .step::before {
  content: ''; position: absolute; left: 0; top: 26px; width: 50%;
  border-top: 1px dashed var(--divider);
}
.step + .step::after {
  content: ''; position: absolute; left: 0; top: 26px; width: 50%;
  border-top: 1px dashed var(--divider); transform: translateX(-100%);
}

/* ============ 界面预览 ============ */

.previews { grid-template-columns: repeat(3, 1fr); gap: 28px; align-items: start; }
.preview-item { text-align: center; }
.preview-item figcaption { margin-top: 18px; font-size: 14px; color: var(--text-sub); }
.preview-item figcaption b { display: block; font-family: var(--font-serif); font-size: 17px; color: var(--ink); margin-bottom: 4px; }
.preview-item .phone { width: 100%; max-width: 268px; box-shadow: var(--shadow-m); }
.demo-note {
  text-align: center; font-size: 13px; color: var(--text-sub);
  margin-top: 34px; font-style: italic;
}

/* ============ 价格 ============ */

.price-wrap { background: var(--ink); color: #F1EDE4; position: relative; overflow: hidden; }
.price-wrap::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(700px 400px at 50% 0%, rgba(37, 99, 235, .3), transparent 65%);
}
.price-wrap .section-head h2 { color: #fff; }
.price-wrap .section-head p { color: rgba(241, 237, 228, .66); }
.plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; position: relative; }
.plan {
  background: rgba(255, 255, 255, .05); border: 1px solid rgba(255, 255, 255, .12);
  border-radius: var(--r); padding: 32px 28px; text-align: center; transition: .25s ease;
}
.plan:hover { transform: translateY(-4px); border-color: rgba(255, 255, 255, .3); }
.plan.hot { border-color: var(--cinnabar); background: rgba(37, 99, 235, .1); position: relative; }
.plan.hot .corner {
  position: absolute; top: -1px; right: 18px; background: var(--cinnabar); color: #fff;
  font-size: 12px; padding: 3px 12px; border-radius: 0 0 8px 8px; font-weight: 600;
}
.plan .name { font-family: var(--font-serif); font-size: 20px; margin-bottom: 6px; }
.plan .amount { font-family: var(--font-serif); font-size: 40px; line-height: 1.2; }
.plan .amount small { font-size: 15px; opacity: .7; }
.plan .desc { font-size: 13.5px; color: rgba(241, 237, 228, .62); margin: 10px 0 20px; }
.plan ul { list-style: none; padding: 0; margin: 0 0 24px; text-align: left; font-size: 14px; }
.plan ul li { padding: 7px 0 7px 24px; position: relative; color: rgba(241, 237, 228, .86); }
.plan ul li::before { content: '✓'; position: absolute; left: 0; color: var(--cinnabar); font-weight: 700; }
.plan .btn { width: 100%; }
.price-note { text-align: center; font-size: 13.5px; color: rgba(241, 237, 228, .55); margin-top: 28px; position: relative; }
.trial-box {
  margin: 0 auto 44px; max-width: 560px; text-align: center; position: relative;
  background: rgba(201, 162, 39, .1); border: 1px dashed rgba(201, 162, 39, .45);
  border-radius: var(--r); padding: 20px 24px;
}
.trial-box b { color: var(--gold); font-family: var(--font-serif); font-size: 17px; }
.trial-box p { margin: 6px 0 0; font-size: 14px; color: rgba(241, 237, 228, .72); }

/* ============ FAQ ============ */

.faq { max-width: 820px; margin: 0 auto; }
.faq details { background: var(--card); border: 1px solid var(--divider); border-radius: var(--r-sm); margin-bottom: 12px; overflow: hidden; }
.faq summary {
  cursor: pointer; padding: 18px 22px; font-weight: 600; font-size: 15.5px;
  list-style: none; display: flex; align-items: center; gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: '+'; margin-left: auto; color: var(--cinnabar); font-size: 20px; font-weight: 700; }
.faq details[open] summary::after { content: '−'; }
.faq details[open] summary { border-bottom: 1px solid var(--divider); }
.faq .a { padding: 16px 22px 20px; color: var(--ink-soft); font-size: 14.5px; border-top: 0; }
.faq .a p { margin: 0 0 10px; }
.faq .a p:last-child { margin-bottom: 0; }

/* ============ 底部 CTA ============ */

.cta {
  text-align: center; padding: 88px 0;
  background: linear-gradient(180deg, rgba(37, 99, 235, .09), transparent);
  border-top: 1px solid var(--divider);
}
.cta h2 { font-size: clamp(28px, 4.4vw, 42px); margin: 0 0 14px; }
.cta p { color: var(--text-sub); margin: 0 0 30px; font-size: 16.5px; }
.cta-sub { margin-top: 20px; font-size: 13.5px; color: var(--text-sub); }
.warn-box {
  display: none; max-width: 560px; margin: 24px auto 0; text-align: left;
  background: #fff; border: 1px solid var(--divider); border-left: 3px solid var(--gold);
  border-radius: var(--r-sm); padding: 16px 18px; font-size: 14px; color: var(--ink-soft);
}
.warn-box.show { display: block; }
.warn-box b { display: block; margin-bottom: 6px; color: var(--ink); font-family: var(--font-serif); }
.warn-box code {
  display: block; margin-top: 10px; padding: 9px 12px; background: var(--paper-deep);
  border-radius: 6px; font-size: 12.5px; word-break: break-all; user-select: all; color: var(--ink);
}

/* ============ 页脚 ============ */

.footer { background: var(--ink-dark); color: rgba(241, 237, 228, .6); padding: 40px 0 30px; font-size: 13.5px; }
.footer-inner { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; display: flex; gap: 24px; flex-wrap: wrap; align-items: center; }
.footer .brand img { width: 26px; height: 26px; }
.footer .brand { color: #F1EDE4; font-size: 17px; }
.footer .links { margin-left: auto; display: flex; gap: 22px; }
.footer .links a:hover { color: #fff; }
.footer .cr { width: 100%; border-top: 1px solid rgba(255, 255, 255, .1); margin-top: 22px; padding-top: 18px; font-size: 12.5px; }

/* ============ 提示条 ============ */

.toast {
  position: fixed; left: 50%; bottom: 30px; transform: translate(-50%, 20px);
  background: var(--ink); color: #fff; padding: 12px 22px; border-radius: 999px;
  font-size: 14px; box-shadow: var(--shadow-l); opacity: 0; pointer-events: none;
  transition: .3s ease; z-index: 99;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ============ 移动提示：非安卓设备 ============ */

body.not-android .install-hint { display: block; }
.install-hint {
  display: none; margin-top: 14px; font-size: 13px; color: var(--cinnabar);
  background: rgba(37, 99, 235, .07); border: 1px solid rgba(37, 99, 235, .2);
  border-radius: 999px; padding: 6px 16px;
}

/* ============ 响应式 ============ */

@media (max-width: 1000px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { order: -1; }
  .hero-text { text-align: center; }
  .lead { margin-left: auto; margin-right: auto; }
  .hero-cta, .hero-trust { justify-content: center; }
  .features, .previews, .plans { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; gap: 30px; }
  .step + .step::before, .step + .step::after { display: none; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); gap: 26px 12px; }
  .nav-links { display: none; }
  .brand { margin-right: auto; }
}

@media (max-width: 560px) {
  .section { padding: 64px 0; }
  .wrap, .hero-inner, .nav-inner, .stats-inner, .footer-inner { padding-left: 18px; padding-right: 18px; }
  .hero { padding: 40px 0 60px; }
  .phone { width: 268px; }
  .feat { padding: 24px 20px; }
  .footer .links { margin-left: 0; }

  /* —— 手机端排版修复：不再横向溢出，文字全部收进屏幕 —— */
  .hero h1 { font-size: clamp(30px, 8.6vw, 40px); }
  .lead { font-size: 15.5px; }
  .stat b { font-size: 24px; }
  /* 长按钮在窄屏允许换行，不再把整页顶宽 */
  .btn { white-space: normal; }
  .btn-lg { padding: 14px 24px; font-size: 16px; }
  .badge { white-space: normal; }
  /* 下载按钮整行铺满，更有点击欲 */
  .hero-cta { gap: 12px; }
  .hero-cta .btn { width: 100%; }
  .hero-cta .hero-meta { width: 100%; text-align: center; }
}

/* ============ 防横向溢出（所有屏幕宽度生效） ============ */

/* 页面绝不出横向滚动条：任何元素超宽都被裁掉而不是撑宽整页 */
html, body { overflow-x: clip; }

/* 网格子项允许收缩：防止按钮 nowrap / 长内容把两栏布局撑爆 */
.hero-inner > *, .plans > *, .features > *, .previews > *,
.steps > *, .stats-inner > * { min-width: 0; }