/* ==========================================================================
   中和环境 ZhongHe Scrubber — 主样式
   白底化学极客 · pH 试纸渐变条 · 酸橙 × 碱紫双色
   ========================================================================== */

:root {
	--c-acid: #f97316;
	--c-acid-deep: #c2410c;
	--c-alkali: #7c3aed;
	--c-alkali-deep: #5b21b6;
	--c-neutral: #22c55e;
	--c-ink: #232136;
	--c-text: #635f76;
	--c-line: #e6e4ee;
	--c-tint: #f6f5fa;
	--ph: linear-gradient(90deg, #ef4444, #f97316, #facc15, #84cc16, #22c55e, #14b8a6, #3b82f6, #6366f1, #8b5cf6);
	--radius: 16px;
	--radius-sm: 11px;
	--shadow: 0 12px 32px rgba(35, 33, 54, 0.09);
	--shadow-lg: 0 26px 62px rgba(35, 33, 54, 0.15);
	--font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", -apple-system, "Segoe UI", sans-serif;
	--mono: "SF Mono", "Menlo", "Consolas", monospace;
}

/* ---------- 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
	margin: 0;
	font-family: var(--font);
	font-size: 16px;
	line-height: 1.78;
	color: var(--c-text);
	background: #fff;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-alkali-deep); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--c-acid); }
h1, h2, h3, h4 { color: var(--c-ink); line-height: 1.28; margin: 0 0 .5em; font-weight: 800; }
p { margin: 0 0 1em; }
code { font-family: var(--mono); }
::selection { background: var(--c-alkali); color: #fff; }

.container { max-width: 1180px; margin: 0 auto; padding: 0 24px; }

.screen-reader-text {
	position: absolute !important;
	width: 1px; height: 1px;
	overflow: hidden; clip: rect(0 0 0 0);
	white-space: nowrap;
}
.skip-link:focus {
	position: fixed; left: 16px; top: 16px; z-index: 999;
	width: auto; height: auto; clip: auto;
	background: var(--c-ink); color: #fff;
	padding: 10px 18px; border-radius: 10px;
}
:focus-visible { outline: 2px solid var(--c-alkali); outline-offset: 2px; }

/* ---------- pH 条 ---------- */
.phstrip { height: 6px; background: var(--ph); }

/* ---------- 按钮 ---------- */
.btn {
	display: inline-flex; align-items: center; gap: 8px;
	padding: 12px 28px;
	border-radius: var(--radius-sm);
	border: 1.5px solid transparent;
	font-size: 15px; font-weight: 700;
	cursor: pointer; white-space: nowrap;
	transition: transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.btn--duo {
	background: linear-gradient(100deg, var(--c-acid), var(--c-alkali));
	color: #fff; box-shadow: 0 10px 26px rgba(124, 58, 237, .28);
}
.btn--duo:hover { color: #fff; box-shadow: 0 14px 32px rgba(249, 115, 22, .32); }
.btn--outline { border-color: var(--c-ink); color: var(--c-ink); background: transparent; }
.btn--outline:hover { background: var(--c-ink); color: #fff; }
.btn--sm { padding: 9px 18px; font-size: 14px; }
.btn--lg { padding: 14px 32px; font-size: 16px; }
.btn--block { width: 100%; justify-content: center; }
.zh-icon { flex-shrink: 0; }

/* ---------- 页头 ---------- */
.site-header {
	position: sticky; top: 0; z-index: 100;
	background: rgba(255, 255, 255, .93);
	backdrop-filter: blur(12px);
	border-bottom: 1px solid var(--c-line);
}
.site-header.is-scrolled { box-shadow: var(--shadow); }
.site-header__inner { display: flex; align-items: center; gap: 28px; min-height: 74px; }
.site-brand { margin-right: auto; }
.site-brand__link { display: flex; align-items: center; gap: 12px; }
.site-brand__mark {
	width: 44px; height: 44px; border-radius: 12px;
	display: grid; place-items: center; color: #fff;
	background: linear-gradient(135deg, var(--c-acid), var(--c-alkali));
	font-size: 15px; font-weight: 900; font-family: var(--mono);
}
.site-brand__name { display: block; font-size: 20px; font-weight: 800; color: var(--c-ink); }
.site-brand__slogan { display: block; font-size: 12px; color: var(--c-text); letter-spacing: .06em; }
.custom-logo { max-height: 48px; width: auto; }

.site-nav__list { list-style: none; display: flex; gap: 4px; margin: 0; padding: 0; }
.site-nav__list li { position: relative; }
.site-nav__list a {
	display: block; padding: 9px 14px;
	color: var(--c-ink); font-weight: 600; font-size: 14.5px;
	border-radius: 9px;
}
.site-nav__list a:hover { color: var(--c-alkali); background: var(--c-tint); }
.site-nav__list .sub-menu {
	position: absolute; top: 100%; left: 0; min-width: 190px;
	list-style: none; margin: 6px 0 0; padding: 8px;
	background: #fff; border: 1px solid var(--c-line); border-radius: 13px;
	box-shadow: var(--shadow-lg);
	opacity: 0; visibility: hidden; transform: translateY(8px);
	transition: all .2s ease;
}
.site-nav__list li:hover > .sub-menu,
.site-nav__list li:focus-within > .sub-menu { opacity: 1; visibility: visible; transform: translateY(0); }

.site-header__actions { display: flex; align-items: center; gap: 14px; }
.nav-toggle {
	display: none; flex-direction: column; justify-content: center; gap: 5px;
	width: 44px; height: 44px; padding: 10px;
	background: none; border: 1.5px solid var(--c-line); border-radius: 11px; cursor: pointer;
}
.nav-toggle span { display: block; height: 2px; background: var(--c-ink); border-radius: 2px; transition: transform .25s ease, opacity .2s ease; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 首屏 ---------- */
.hero { position: relative; overflow: hidden; }
.hero::before {
	content: ""; position: absolute; left: -160px; top: -160px;
	width: 440px; height: 440px; border-radius: 50%;
	background: radial-gradient(circle, rgba(249, 115, 22, .1), transparent 65%);
}
.hero::after {
	content: ""; position: absolute; right: -160px; bottom: -160px;
	width: 440px; height: 440px; border-radius: 50%;
	background: radial-gradient(circle, rgba(124, 58, 237, .1), transparent 65%);
}
.hero__inner {
	position: relative; z-index: 1;
	display: grid; grid-template-columns: 1.04fr .96fr; gap: 52px; align-items: center;
	padding-top: 84px; padding-bottom: 92px;
}
.hero__eyebrow {
	display: inline-flex; align-items: center; gap: 8px;
	font-size: 13.5px; font-weight: 700;
	color: var(--c-alkali-deep);
	background: var(--c-tint);
	border: 1px solid var(--c-line);
	padding: 7px 16px; border-radius: 999px;
}
.hero__eyebrow .zh-icon { color: var(--c-acid); }
.hero__title { font-size: clamp(36px, 4.8vw, 58px); font-weight: 900; margin: 22px 0 16px; }
.hero__title .t-acid { color: var(--c-acid); }
.hero__title .t-alkali { color: var(--c-alkali); margin-left: .3em; }
.hero__title em { font-style: normal; color: var(--c-neutral); }
.hero__ph { position: relative; display: flex; gap: 5px; max-width: 380px; margin: 6px 0 20px; }
.hero__ph i { flex: 1; height: 14px; border-radius: 5px; }
.hero__ph i:nth-child(1) { background: #ef4444; }
.hero__ph i:nth-child(2) { background: #f97316; }
.hero__ph i:nth-child(3) { background: #facc15; }
.hero__ph i:nth-child(4) { background: #84cc16; }
.hero__ph i:nth-child(5) { background: #22c55e; outline: 3px solid var(--c-ink); outline-offset: 2px; border-radius: 4px; }
.hero__ph i:nth-child(6) { background: #14b8a6; }
.hero__ph i:nth-child(7) { background: #3b82f6; }
.hero__ph i:nth-child(8) { background: #6366f1; }
.hero__ph i:nth-child(9) { background: #8b5cf6; }
.hero__ph-mark {
	position: absolute; left: 44%; top: -26px;
	font-family: var(--mono); font-size: 12px; font-weight: 700; color: var(--c-ink);
}
.hero__desc { font-size: 16.5px; max-width: 31em; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin: 28px 0 34px; }
.hero__stats { list-style: none; display: flex; flex-wrap: wrap; gap: 14px 38px; margin: 0; padding: 0; }
.hero__stats li { display: flex; flex-direction: column; }
.hero__stats strong { font-size: 29px; font-weight: 800; color: var(--c-ink); font-variant-numeric: tabular-nums; }
.hero__stats span { font-size: 13px; }

/* 塔运行卡 */
.towercard {
	background: #fff; border: 1px solid var(--c-line); border-radius: 20px;
	padding: 28px 30px;
	box-shadow: var(--shadow-lg);
	position: relative; overflow: hidden;
}
.towercard::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 5px; background: var(--ph); }
.towercard__title { display: flex; align-items: center; gap: 9px; font-size: 14px; font-weight: 700; color: var(--c-ink); margin: 6px 0 20px; }
.towercard__title .zh-icon { color: var(--c-alkali); }
.towercard__flow { display: grid; grid-template-columns: 1fr auto 1fr; gap: 14px; align-items: center; margin-bottom: 18px; }
.towercard__node { border-radius: 14px; padding: 16px 18px; text-align: center; }
.towercard__node--acid { background: rgba(249, 115, 22, .09); border: 1.5px solid rgba(249, 115, 22, .4); }
.towercard__node--ok { background: rgba(34, 197, 94, .09); border: 1.5px solid rgba(34, 197, 94, .45); }
.towercard__node span { display: block; font-size: 12px; }
.towercard__node strong { display: block; font-family: var(--mono); font-size: 26px; font-weight: 800; color: var(--c-ink); line-height: 1.3; }
.towercard__node--acid strong { color: var(--c-acid-deep); }
.towercard__node--ok strong { color: #15803d; }
.towercard__node em { display: block; font-style: normal; font-size: 12px; }
.towercard__arrow { color: var(--c-neutral); }
.towercard__rows { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.towercard__rows li {
	display: grid; grid-template-columns: 1fr auto 12px; gap: 12px; align-items: center;
	background: var(--c-tint); border-radius: 10px;
	padding: 10px 14px; font-size: 13px;
}
.towercard__rows b { font-family: var(--mono); color: var(--c-ink); }
.towercard__rows i.ok { width: 9px; height: 9px; border-radius: 50%; background: var(--c-neutral); box-shadow: 0 0 8px rgba(34, 197, 94, .7); }

/* ---------- 酸碱双路 ---------- */
.duo { padding: 84px 0; }
.duo__grid { display: grid; grid-template-columns: 1fr auto 1fr; gap: 26px; align-items: stretch; }
.duo-card { border-radius: var(--radius); padding: 32px 34px; }
.duo-card--acid { background: linear-gradient(160deg, #fff4ec, #fff); border: 1.5px solid rgba(249, 115, 22, .45); }
.duo-card--alkali { background: linear-gradient(160deg, #f3eeff, #fff); border: 1.5px solid rgba(124, 58, 237, .4); }
.duo-card__tag {
	display: inline-block; font-size: 12.5px; font-weight: 800; letter-spacing: .1em;
	color: #fff; padding: 4px 14px; border-radius: 999px; margin-bottom: 14px;
}
.duo-card--acid .duo-card__tag { background: var(--c-acid); }
.duo-card--alkali .duo-card__tag { background: var(--c-alkali); }
.duo-card h2 { font-size: 21px; margin-bottom: 8px; font-family: var(--mono); font-weight: 700; }
.duo-card p { font-size: 14.5px; margin-bottom: 14px; }
.duo-card code {
	display: block; font-size: 13.5px; color: var(--c-ink);
	background: rgba(35, 33, 54, .05); border-radius: 9px; padding: 10px 14px;
}
.duo__center { align-self: center; }
.duo__center span {
	display: grid; place-items: center;
	width: 74px; height: 74px; border-radius: 50%;
	background: var(--c-neutral); color: #fff;
	font-size: 19px; font-weight: 900; line-height: 1.25; text-align: center;
	box-shadow: 0 14px 30px rgba(34, 197, 94, .4);
}

/* ---------- 通用版块 ---------- */
.section { padding: 92px 0; }
.section--pad { padding: 64px 0 92px; }
.section--tint { background: var(--c-tint); }
.section-head { max-width: 660px; margin: 0 auto 52px; text-align: center; }
.section-head__eyebrow { font-size: 12.5px; font-weight: 800; letter-spacing: .3em; color: var(--c-acid); margin-bottom: 11px; }
.section-head__title { font-size: clamp(26px, 3.2vw, 40px); margin-bottom: 14px; }
.section-head__desc { margin: 0; }
.section-foot { text-align: center; margin: 46px 0 0; }

/* ---------- 产品卡片 ---------- */
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.product-card {
	background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
	overflow: hidden; display: flex; flex-direction: column;
	position: relative;
	transition: transform .25s ease, box-shadow .25s ease;
}
.product-card::before {
	content: ""; position: absolute; left: 0; right: 0; top: 0; height: 4px;
	background: var(--ph); z-index: 1;
	opacity: 0; transition: opacity .25s ease;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.product-card:hover::before { opacity: 1; }
.product-card__media {
	position: relative; display: block; aspect-ratio: 16 / 10;
	background:
		radial-gradient(circle at 24% 30%, rgba(249, 115, 22, .13), transparent 50%),
		radial-gradient(circle at 78% 72%, rgba(124, 58, 237, .13), transparent 50%),
		var(--c-tint);
	overflow: hidden;
}
.product-card__media img { width: 100%; height: 100%; object-fit: cover; }
.product-card__ph { position: absolute; inset: 0; display: grid; place-items: center; color: var(--c-alkali); }
.product-card__spec {
	position: absolute; left: 14px; bottom: 12px;
	font-size: 12px; font-weight: 700; color: var(--c-ink);
	background: #fff; border: 1px solid var(--c-line);
	padding: 4px 12px; border-radius: 999px;
}
.product-card__body { padding: 22px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.product-card__title { font-size: 17px; margin-bottom: 8px; }
.product-card__title a { color: var(--c-ink); }
.product-card__title a:hover { color: var(--c-alkali); }
.product-card__desc { font-size: 14px; flex: 1; margin-bottom: 14px; }
.product-card__more { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 700; color: var(--c-acid); transition: gap .2s ease; }
.product-card__more:hover { gap: 10px; }

/* ---------- 选塔四问 ---------- */
.quads {
	list-style: none; margin: 0; padding: 0;
	display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px;
}
.quad {
	background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
	padding: 28px 26px 24px;
	transition: transform .25s ease, box-shadow .25s ease;
}
.quad:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.quad__num {
	display: inline-block;
	font-family: var(--mono); font-size: 14px; font-weight: 800;
	color: #fff; padding: 4px 13px; border-radius: 999px; margin-bottom: 14px;
}
.q-acid { background: var(--c-acid); }
.q-alkali { background: var(--c-alkali); }
.quad h3 { font-size: 17.5px; margin-bottom: 6px; }
.quad p { font-size: 13.5px; margin: 0; }

/* ---------- 场景 ---------- */
.scene-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.scene-card {
	background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
	padding: 26px 26px 22px;
	transition: transform .25s ease, box-shadow .25s ease;
}
.scene-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.scene-card__icon {
	display: inline-grid; place-items: center;
	width: 50px; height: 50px; border-radius: 13px;
	margin-bottom: 14px;
}
.scene-card--acid .scene-card__icon { color: var(--c-acid-deep); background: rgba(249, 115, 22, .11); }
.scene-card--alkali .scene-card__icon { color: var(--c-alkali-deep); background: rgba(124, 58, 237, .11); }
.scene-card--acid { border-top: 3px solid var(--c-acid); }
.scene-card--alkali { border-top: 3px solid var(--c-alkali); }
.scene-card h3 { font-size: 17px; margin-bottom: 6px; }
.scene-card p { font-size: 14px; margin: 0; }

/* ---------- 案例 ---------- */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card {
	background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
	padding: 26px 28px;
	transition: transform .25s ease, box-shadow .25s ease;
}
.case-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.case-card__badge {
	display: inline-block;
	font-family: var(--mono); font-size: 11.5px; font-weight: 800; letter-spacing: .12em;
	color: var(--c-alkali-deep); background: rgba(124, 58, 237, .08);
	border: 1px solid rgba(124, 58, 237, .3);
	padding: 3px 12px; border-radius: 999px; margin-bottom: 14px;
}
.case-card h3 { font-size: 17.5px; margin-bottom: 6px; }
.case-card__meta { font-size: 13px; color: var(--c-acid); font-weight: 700; margin-bottom: 10px; }
.case-card__desc { font-size: 14px; margin: 0; }

/* ---------- 新闻 ---------- */
.news-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.news-card {
	background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
	padding: 26px 28px 22px;
	transition: transform .25s ease, box-shadow .25s ease;
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.news-card__date { font-size: 13px; color: var(--c-alkali); font-weight: 700; margin-bottom: 10px; }
.news-card h3 { font-size: 16.5px; margin-bottom: 10px; }
.news-card h3 a { color: var(--c-ink); }
.news-card h3 a:hover { color: var(--c-acid); }
.news-card__desc { font-size: 14px; }
.news-card__more { display: inline-flex; align-items: center; gap: 6px; font-size: 13.5px; font-weight: 700; color: var(--c-acid); }

/* ---------- 联系 ---------- */
.contact { display: grid; grid-template-columns: 1fr 1.05fr; gap: 56px; align-items: center; }
.contact__copy .section-head__eyebrow, .contact__copy .section-head__title { text-align: left; }
.contact__list { list-style: none; margin: 28px 0 0; padding: 0; display: grid; gap: 16px; }
.contact__list li { display: flex; align-items: center; gap: 12px; font-size: 15px; color: var(--c-ink); }
.contact__list .zh-icon { color: var(--c-alkali); }

.contact__form-wrap {
	background: #fff; border: 1px solid var(--c-line); border-radius: 20px;
	padding: 34px; box-shadow: var(--shadow-lg);
	position: relative; overflow: hidden;
}
.contact__form-wrap::before { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 5px; background: var(--ph); }
.contact-form h3 { font-size: 20px; margin: 6px 0 20px; }
.contact-form p { margin-bottom: 16px; }
.contact-form label { display: block; font-size: 14px; font-weight: 700; color: var(--c-ink); margin-bottom: 6px; }
.contact-form input[type="text"],
.contact-form input[type="tel"],
.contact-form textarea {
	width: 100%; padding: 12px 15px;
	border: 1.5px solid var(--c-line); border-radius: var(--radius-sm);
	font-family: inherit; font-size: 15px; color: var(--c-ink);
	background: var(--c-tint);
	transition: border-color .2s ease, box-shadow .2s ease;
}
.contact-form input:focus, .contact-form textarea:focus {
	outline: none; border-color: var(--c-alkali);
	box-shadow: 0 0 0 4px rgba(124, 58, 237, .12);
	background: #fff;
}
.contact-form__tip { font-size: 12.5px; color: #9b97ac; text-align: center; margin: 12px 0 0; }
.hp-field { position: absolute !important; left: -9999px; }
.form-notice {
	background: rgba(34, 197, 94, .08); border: 1px solid rgba(34, 197, 94, .4); color: #15803d;
	border-radius: var(--radius-sm); padding: 13px 17px; margin-bottom: 18px; font-size: 14.5px;
}

/* ---------- 内页头部 ---------- */
.page-hero {
	position: relative;
	background: var(--c-tint);
	padding: 64px 0;
	border-bottom: 1px solid var(--c-line);
	overflow: hidden;
}
.page-hero::after { content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 5px; background: var(--ph); }
.page-hero__title { font-size: clamp(28px, 3.6vw, 42px); font-weight: 900; margin: 0; }
.page-hero__sub { margin: 10px 0 0; }
.page-hero__meta { font-size: 13.5px; color: var(--c-alkali); font-weight: 700; margin: 0 0 10px; }
.page-hero__meta a { color: var(--c-alkali); }

/* ---------- 博客列表 ---------- */
.post-list { display: grid; gap: 22px; max-width: 860px; margin: 0 auto; }
.post-card {
	display: grid; grid-template-columns: 280px 1fr;
	background: #fff; border: 1px solid var(--c-line); border-radius: var(--radius);
	overflow: hidden; transition: transform .25s ease, box-shadow .25s ease;
}
.post-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.post-card__thumb img { width: 100%; height: 100%; object-fit: cover; }
.post-card:not(:has(.post-card__thumb)) { grid-template-columns: 1fr; }
.post-card__body { padding: 24px 28px; }
.post-card__meta { font-size: 13px; color: var(--c-acid); font-weight: 700; margin-bottom: 8px; }
.post-card__meta a { color: inherit; }
.post-card__title { font-size: 19px; margin-bottom: 8px; }
.post-card__title a { color: var(--c-ink); }
.post-card__title a:hover { color: var(--c-alkali); }
.post-card__desc { font-size: 14.5px; margin-bottom: 12px; }
.post-card__more { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 700; color: var(--c-acid); }
.no-results { text-align: center; padding: 60px 0; }

.navigation.pagination { margin: 46px 0 0; text-align: center; }
.nav-links { display: flex; justify-content: center; gap: 8px; flex-wrap: wrap; }
.nav-links .page-numbers {
	display: inline-block; min-width: 42px; padding: 9px 14px;
	border: 1.5px solid var(--c-line); border-radius: 10px;
	color: var(--c-ink); font-weight: 700; font-size: 14px; background: #fff;
}
.nav-links .page-numbers.current,
.nav-links .page-numbers:hover { background: var(--c-alkali); border-color: var(--c-alkali); color: #fff; }

/* ---------- 文章内容 ---------- */
.entry-wrap { max-width: 860px; padding-top: 48px; padding-bottom: 92px; }
.entry__thumb { margin: 0 0 32px; border-radius: var(--radius); overflow: hidden; }
.entry__content { font-size: 16.5px; }
.entry__content h2 { font-size: 26px; margin-top: 1.6em; }
.entry__content h3 { font-size: 21px; margin-top: 1.4em; }
.entry__content img { border-radius: var(--radius-sm); }
.entry__content blockquote {
	margin: 1.5em 0; padding: 16px 24px;
	border-left: 4px solid var(--c-alkali);
	background: var(--c-tint); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.entry__content code { background: var(--c-tint); border: 1px solid var(--c-line); border-radius: 6px; padding: 2px 8px; font-size: .88em; color: var(--c-alkali-deep); }
.entry__content table { width: 100%; border-collapse: collapse; margin: 1.5em 0; }
.entry__content th, .entry__content td { border: 1px solid var(--c-line); padding: 10px 14px; text-align: left; }
.entry__content th { background: var(--c-tint); }
.entry__tags { margin-top: 28px; font-size: 14px; }
.page-links { margin: 24px 0; }

.post-nav {
	display: flex; justify-content: space-between; gap: 20px;
	margin: 44px 0; padding-top: 28px; border-top: 1px solid var(--c-line);
	font-size: 14.5px;
}
.post-nav__next { text-align: right; }

/* ---------- 评论 ---------- */
.comments-area { margin-top: 48px; }
.comments-title, .comment-reply-title { font-size: 21px; }
.comment-list { list-style: none; margin: 0 0 30px; padding: 0; }
.comment-list .comment { border-bottom: 1px solid var(--c-line); padding: 20px 0; }
.comment-list .children { list-style: none; padding-left: 40px; }
.comment-author { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--c-ink); }
.comment-author .avatar { border-radius: 12px; }
.comment-metadata { font-size: 12.5px; }
.comment-content { font-size: 15px; }
.reply { font-size: 13.5px; }
.comment-form input[type="text"], .comment-form input[type="email"], .comment-form input[type="url"], .comment-form textarea {
	width: 100%; padding: 11px 14px;
	border: 1.5px solid var(--c-line); border-radius: var(--radius-sm);
	font-family: inherit; font-size: 15px; background: var(--c-tint);
}
.comment-form input:focus, .comment-form textarea:focus { outline: none; border-color: var(--c-alkali); background: #fff; }
.form-submit .submit {
	background: linear-gradient(100deg, var(--c-acid), var(--c-alkali));
	color: #fff; border: 0; border-radius: var(--radius-sm); padding: 12px 30px;
	font-size: 15px; font-weight: 700; cursor: pointer;
}

/* ---------- 搜索 / 404 ---------- */
.search-form { display: flex; gap: 10px; max-width: 480px; }
.search-form__input {
	flex: 1; padding: 12px 16px;
	border: 1.5px solid var(--c-line); border-radius: var(--radius-sm);
	font-family: inherit; font-size: 15px; background: #fff;
}
.search-form__input:focus { outline: none; border-color: var(--c-alkali); }
.error-404 { text-align: center; padding: 40px 0; }
.error-404__code {
	font-size: clamp(90px, 16vw, 160px); font-weight: 900; line-height: 1;
	background: var(--ph);
	-webkit-background-clip: text; background-clip: text; color: transparent;
	margin: 0 0 10px;
}
.error-404 .search-form { margin: 24px auto 28px; justify-content: center; }

/* ---------- 产品详情 / 归档 ---------- */
.product-single { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; padding-top: 56px; padding-bottom: 40px; align-items: start; }
.product-single__media {
	position: relative; border-radius: var(--radius); overflow: hidden;
	aspect-ratio: 4 / 3;
	border: 1px solid var(--c-line);
	background:
		radial-gradient(circle at 24% 30%, rgba(249, 115, 22, .13), transparent 50%),
		radial-gradient(circle at 78% 72%, rgba(124, 58, 237, .13), transparent 50%),
		var(--c-tint);
}
.product-single__media img { width: 100%; height: 100%; object-fit: cover; }
.product-single__ph { position: absolute; inset: 0; display: grid; place-items: center; color: var(--c-alkali); }
.product-single__summary {
	background: var(--c-tint); border: 1px solid var(--c-line);
	border-radius: var(--radius-sm); padding: 16px 20px; margin-bottom: 24px;
	font-size: 15px; color: var(--c-ink);
}
.product-single__summary p { margin: 0; }
.product-single__cta {
	margin-top: 32px; padding: 26px 28px;
	border-radius: var(--radius);
	background: linear-gradient(120deg, rgba(249, 115, 22, .07), rgba(124, 58, 237, .07));
	border: 1px solid var(--c-line);
}
.product-single__cta h3 { font-size: 17px; margin-bottom: 6px; }
.product-single__cta p { font-size: 14px; margin-bottom: 16px; }
.product-single__cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.related-title { font-size: 23px; margin-bottom: 26px; }
.archive-cta {
	margin-top: 64px; text-align: center;
	background: var(--c-tint); border-radius: 20px; padding: 48px 32px;
}
.archive-cta h2 { font-size: 24px; }
.archive-cta p { margin-bottom: 20px; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--c-ink); color: rgba(255, 255, 255, .66); }
.site-footer .phstrip { height: 5px; }
.site-footer__grid {
	display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 44px;
	padding-top: 58px; padding-bottom: 46px;
}
.site-footer__logo { display: flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 800; color: #fff; margin-bottom: 14px; }
.site-footer__logo span {
	display: grid; place-items: center;
	width: 36px; height: 36px; border-radius: 10px;
	background: linear-gradient(135deg, var(--c-acid), var(--c-alkali));
	font-family: var(--mono); font-size: 13px; font-weight: 900;
}
.site-footer__about { font-size: 14px; line-height: 1.85; }
.site-footer__phone { display: flex; align-items: center; gap: 10px; font-size: 21px; font-weight: 800; color: #c4b5fd; margin-top: 18px; }
.site-footer__title { color: #fff; font-size: 15.5px; margin-bottom: 18px; }
.site-footer__menu { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.site-footer__menu a { color: rgba(255, 255, 255, .66); font-size: 14px; }
.site-footer__menu a:hover { color: #fdba74; }
.site-footer__contact { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; font-size: 14px; }
.site-footer__contact li { display: flex; gap: 9px; align-items: flex-start; }
.site-footer__contact .zh-icon { color: #c4b5fd; margin-top: 4px; }
.site-footer__bottom { border-top: 1px solid rgba(255, 255, 255, .12); }
.site-footer__bottom-inner {
	display: flex; justify-content: space-between; gap: 12px; flex-wrap: wrap;
	padding-top: 20px; padding-bottom: 20px; font-size: 13px;
}
.site-footer__bottom p { margin: 0; }

/* ---------- 返回顶部 ---------- */
.back-to-top {
	position: fixed; right: 26px; bottom: 26px; z-index: 90;
	width: 46px; height: 46px; border: 0; border-radius: 13px;
	display: grid; place-items: center; cursor: pointer;
	background: linear-gradient(135deg, var(--c-acid), var(--c-alkali));
	color: #fff; box-shadow: 0 12px 28px rgba(124, 58, 237, .35);
	opacity: 0; visibility: hidden; transform: translateY(12px);
	transition: all .25s ease;
}
.back-to-top .zh-icon { transform: rotate(-90deg); }
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }

/* ---------- 入场动画 ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
	html { scroll-behavior: auto; }
	.reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
	.hero__inner { grid-template-columns: 1fr; }
	.product-grid, .scene-grid, .case-grid, .news-grid { grid-template-columns: repeat(2, 1fr); }
	.quads { grid-template-columns: repeat(2, 1fr); }
	.duo__grid { grid-template-columns: 1fr; }
	.duo__center { justify-self: center; }
	.contact { grid-template-columns: 1fr; gap: 44px; }
	.site-footer__grid { grid-template-columns: 1fr 1fr; }
	.product-single { grid-template-columns: 1fr; }
}

@media (max-width: 820px) {
	.nav-toggle { display: flex; }
	.site-header__actions .btn { display: none; }
	.site-nav {
		position: fixed; top: 0; right: 0; bottom: 0; z-index: 200;
		width: min(320px, 84vw);
		background: #fff; box-shadow: -20px 0 60px rgba(35, 33, 54, .2);
		padding: 84px 28px 28px;
		transform: translateX(100%); transition: transform .3s ease;
		overflow-y: auto;
	}
	.site-nav.is-open { transform: translateX(0); }
	.site-nav__list { flex-direction: column; gap: 4px; }
	.site-nav__list a { padding: 13px 14px; font-size: 16px; }
	.site-nav__list .sub-menu {
		position: static; opacity: 1; visibility: visible; transform: none;
		box-shadow: none; border: 0; padding: 0 0 0 18px; margin: 0;
	}
	.nav-toggle { position: relative; z-index: 210; }
	body.nav-open { overflow: hidden; }
}

@media (max-width: 620px) {
	.section { padding: 64px 0; }
	.product-grid, .scene-grid, .case-grid, .news-grid { grid-template-columns: 1fr; }
	.quads { grid-template-columns: 1fr; }
	.post-card { grid-template-columns: 1fr; }
	.post-card__thumb { aspect-ratio: 16 / 9; overflow: hidden; }
	.site-footer__grid { grid-template-columns: 1fr; gap: 32px; }
	.contact__form-wrap { padding: 26px 22px; }
	.towercard { padding: 22px 20px; }
	.towercard__flow { grid-template-columns: 1fr; }
	.towercard__arrow { justify-self: center; transform: rotate(90deg); }
}

/* 优化 · 全局尊重系统"减少动态效果"（覆盖装饰性 keyframes 动画） */
@media (prefers-reduced-motion: reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important;}}

/* ==========================================================================
   美化优化 v1.1 · 2026-07 — pH 试纸化学极客风精修
   ========================================================================== */
/* 通用 UX */
html { scroll-padding-top: 88px; }
h1, h2, h3 { text-wrap: balance; }
p { text-wrap: pretty; }
.btn:active { transform: translateY(0) scale(.98); transition-duration: .08s; }

/* 双色按钮:渐变缓移 */
.btn--duo { background-size: 170% 100%; transition: transform .2s ease, box-shadow .2s ease, background-position .45s ease, color .2s ease; }
.btn--duo:hover { background-position: 80% 0; }

/* 导航:当前项碱紫常亮 */
.site-nav__list > li.current-menu-item > a { color: var(--c-alkali-deep); background: var(--c-tint); }

/* pH 试纸:格子可玩(悬停拉高变色更饱和) + 中性格呼吸描边 */
.hero__ph i { transition: transform .22s ease, filter .22s ease; transform-origin: bottom; cursor: pointer; }
.hero__ph i:hover { transform: scaleY(1.4); filter: saturate(1.35); }
@keyframes zh-neutral { 0%, 100% { outline-color: var(--c-ink); } 50% { outline-color: rgba(34, 197, 94, .75); } }
.hero__ph i:nth-child(5) { animation: zh-neutral 3.5s ease-in-out infinite; }

/* 塔运行卡:达标节点脉动 + 行悬停 */
@keyframes zh-okpulse { 0%, 100% { box-shadow: 0 0 8px rgba(34, 197, 94, .7); } 50% { box-shadow: 0 0 14px rgba(34, 197, 94, 1); } }
.towercard__rows i.ok { animation: zh-okpulse 2.6s ease-in-out infinite; }
.towercard__rows li { transition: background .25s ease; }
.towercard__rows li:hover { background: #eef0f6; }
.towercard__arrow { transition: transform .3s ease; }
.towercard:hover .towercard__arrow { transform: translateX(4px); }

/* 酸碱双路:温冷微倾 + 中和徽章弹性 */
.duo-card { transition: transform .3s ease, box-shadow .3s ease; }
.duo-card--acid:hover { transform: translateY(-4px) rotate(-.4deg); box-shadow: 0 18px 44px rgba(249, 115, 22, .16); }
.duo-card--alkali:hover { transform: translateY(-4px) rotate(.4deg); box-shadow: 0 18px 44px rgba(124, 58, 237, .16); }
.duo__center span { transition: transform .3s cubic-bezier(.34, 1.56, .64, 1); }
.duo__grid:hover .duo__center span { transform: scale(1.1); }
.duo-card code { transition: background .25s ease; }
.duo-card:hover code { background: rgba(35, 33, 54, .08); }

/* 产品卡:图区微缩放 + 规格丸转中性绿 */
.product-card__media img, .product-card__ph { transition: transform .45s ease; }
.product-card:hover .product-card__media img,
.product-card:hover .product-card__ph { transform: scale(1.05); }
.product-card__spec { transition: border-color .25s ease, color .25s ease; }
.product-card:hover .product-card__spec { border-color: rgba(34, 197, 94, .55); color: #15803d; }

/* 选塔四问:编号丸反白 */
.quad__num { transition: transform .25s ease, box-shadow .25s ease; }
.quad:hover .quad__num { transform: scale(1.08); box-shadow: 0 6px 16px rgba(35, 33, 54, .18); }

/* 场景:顶色条增粗感(用内阴影模拟) + 图标填色 */
.scene-card--acid:hover { box-shadow: var(--shadow), inset 0 3px 0 var(--c-acid); }
.scene-card--alkali:hover { box-shadow: var(--shadow), inset 0 3px 0 var(--c-alkali); }
.scene-card__icon { transition: background .3s ease, color .3s ease; }
.scene-card--acid:hover .scene-card__icon { background: var(--c-acid); color: #fff; }
.scene-card--alkali:hover .scene-card__icon { background: var(--c-alkali); color: #fff; }

/* 表单:聚焦中性绿环 */
.contact-form input:focus, .contact-form textarea:focus { box-shadow: 0 0 0 4px rgba(34, 197, 94, .14); }

/* 页脚:pH 彩虹发丝线(主题签名) + 链接滑入 */
.site-footer { position: relative; }
.site-footer::before {
	content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2.5px; opacity: .85;
	background: var(--ph);
}
.site-footer__menu a { transition: color .2s ease, padding-left .2s ease; }
.site-footer__menu a:hover { padding-left: 6px; }

/* 减动效 */
@media (prefers-reduced-motion: reduce) {
	.hero__ph i:nth-child(5), .towercard__rows i.ok { animation: none; }
}