:root {
  --tuolin-orange: #ff7900;
  --tuolin-orange-dark: #e86600;
  --navy-950: #071828;
  --navy-900: #0b2036;
  --navy-800: #122b45;
  --navy-700: #1d3b58;
  --ink: #091c33;
  --muted: #5d7186;
  --muted-light: #c8d3de;
  --surface: #f7f9fb;
  --surface-blue: #eaf2f8;
  --line: #d5e0ea;
  --white: #ffffff;
  --shadow: 0 18px 60px rgba(7, 24, 40, 0.12);
  --radius: 18px;
  --max-width: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }

.container { width: min(calc(100% - 48px), var(--max-width)); margin: 0 auto; }
.eyebrow {
  margin: 0 0 12px;
  color: var(--tuolin-orange);
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.section-heading { max-width: 720px; margin-bottom: 42px; }
.section-heading h2 { margin: 0 0 14px; font-size: clamp(2rem, 4vw, 3.25rem); line-height: 1.08; letter-spacing: -0.045em; }
.section-heading p { margin: 0; color: var(--muted); font-size: 1.08rem; }
.section-heading--light h2, .section-heading--light p { color: var(--white); }
.section-heading--light p { color: var(--muted-light); }
.text-link { color: var(--tuolin-orange); font-weight: 800; }
.text-link::after { content: " →"; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(7, 24, 40, 0.95);
  border-bottom: 1px solid rgba(255,255,255,0.1);
  backdrop-filter: blur(18px);
}
.site-header__inner { min-height: 78px; display: flex; align-items: center; gap: 30px; }
.logo { width: 142px; height: auto; }
.nav { display: flex; align-items: center; gap: 27px; margin-left: auto; }
.nav a { color: #e8eef4; font-size: 0.9rem; font-weight: 700; transition: color .2s ease; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--tuolin-orange); }
.header-actions { display: flex; align-items: center; gap: 16px; margin-left: 10px; }
.language { padding-right: 16px; border-right: 1px solid rgba(255,255,255,.4); color: #c8d3de; font-size: 0.82rem; font-weight: 700; }
.menu-toggle { display: none; border: 0; padding: 8px; background: transparent; color: var(--white); cursor: pointer; }
.menu-toggle span { display: block; width: 23px; height: 2px; margin: 5px 0; background: currentColor; }

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 0 21px;
  border: 1px solid transparent;
  border-radius: 7px;
  background: var(--tuolin-orange);
  color: var(--white);
  font-size: 0.9rem;
  font-weight: 800;
  cursor: pointer;
  transition: transform .2s ease, background .2s ease, border-color .2s ease;
}
.button:hover { transform: translateY(-2px); background: var(--tuolin-orange-dark); }
.button--outline { border-color: rgba(255,255,255,0.7); background: transparent; }
.button--outline:hover { background: var(--white); color: var(--navy-900); border-color: var(--white); }
.button--dark { background: var(--navy-900); }
.button--small { min-height: 42px; padding: 0 16px; font-size: 0.82rem; }
.button--full { width: 100%; }

.home-page .site-header { position: absolute; top: 0; right: 0; left: 0; background: linear-gradient(180deg, rgba(7,24,40,.72), rgba(7,24,40,.08)); border-bottom-color: rgba(255,255,255,.12); }
.home-page .container, .home-page .hero__content { width: min(calc(100% - 120px), 1410px); }

.hero { 
  position: relative;
  min-height: 440px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: radial-gradient(circle at 82% 42%, rgba(29, 59, 88, .9), transparent 38%), var(--navy-900);
  color: var(--white);
}
.hero::before { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 84% 46%, rgba(39, 70, 96, .52), transparent 44%); opacity: .9; }
.hero::after { content: ""; position: absolute; z-index: 1; inset: 0; background: linear-gradient(90deg, rgba(7,24,40,.98) 0%, rgba(7,24,40,.86) 22%, rgba(7,24,40,.58) 38%, rgba(7,24,40,.25) 54%, rgba(7,24,40,.06) 72%, rgba(7,24,40,0) 90%); pointer-events: none; }
.hero__scene { position: absolute; z-index: 0; top: 0; right: 0; bottom: 0; width: 57%; overflow: hidden; background: var(--navy-900); }
.hero__scene::before { display: none; }
.hero__scene { -webkit-mask-image: linear-gradient(90deg, transparent 0%, rgba(0,0,0,.18) 14%, rgba(0,0,0,.62) 31%, #000 48%, #000 100%); mask-image: linear-gradient(90deg, transparent 0%, rgba(0,0,0,.18) 14%, rgba(0,0,0,.62) 31%, #000 48%, #000 100%); }
.hero__scene::after { content: ""; position: absolute; z-index: 2; inset: 0; background: linear-gradient(90deg, rgba(7,24,40,.2) 0%, rgba(7,24,40,.07) 28%, rgba(7,24,40,0) 58%); pointer-events: none; }
.hero__scene img { position: relative; z-index: 1; width: 100%; height: 100%; object-fit: cover; object-position: center; filter: saturate(.96) contrast(1) brightness(.98); }
.hero__content { position: relative; z-index: 3; width: min(calc(100% - 48px), var(--max-width)); margin: 0 auto; padding: 92px 33% 32px 0; }
.hero h1 { max-width: 900px; margin: 0 0 15px; font-size: clamp(2.9rem, 4.3vw, 3.9rem); line-height: .98; letter-spacing: -0.065em; }
.hero__lead { max-width: 760px; margin: 0 0 25px; color: #d4e0ea; font-size: clamp(1.05rem, 1.8vw, 1.3rem); }
.hero__buttons { display: flex; flex-wrap: wrap; gap: 14px; }
.hero__proof { display: grid; grid-template-columns: repeat(3, minmax(0, 220px)); gap: 18px; margin-top: 32px; color: var(--muted-light); font-size: .78rem; }
.hero__proof-item { display: flex; align-items: center; gap: 10px; min-width: 0; }
.hero__proof-icon { display: grid; width: 34px; height: 34px; flex: 0 0 34px; place-items: center; border: 1.5px solid rgba(255,255,255,.72); border-radius: 7px; color: var(--white); font-size: 1.05rem; line-height: 1; }
.hero__proof strong { display: block; color: var(--white); font-size: .82rem; line-height: 1.15; }
.hero__proof small { display: block; margin-top: 4px; color: var(--muted-light); font-size: .7rem; line-height: 1.2; }
.product-hero .hero__proof { grid-template-columns: repeat(2, minmax(0, 220px)); }

.products { padding: 28px 0 22px; background: var(--surface-blue); }
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
/* 上图下文，不是左图右文。产品主图是横向的（约 1.23），三列布局下
   侧栏最宽也就 180px 左右——横向大图塞进竖长条里，cover 会裁掉一半
   产品，contain 又会缩成一小块悬在灰条中间（实测上下各空 82px）。
   让图拿到整张卡的宽度，盒子按图片本身的比例给，两个问题一起消失。 */
.product-card { display: flex; flex-direction: column; overflow: hidden; border: 1px solid var(--line); border-radius: 10px; background: var(--white); box-shadow: 0 10px 30px rgba(9, 28, 51, .04); transition: transform .25s ease, box-shadow .25s ease; }
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
/* 5/4 贴近三张主图的实际比例（1.22–1.29），contain 之后几乎铺满，
   只在两侧留几像素——产品完整，又不显得空 */
.product-card__image { aspect-ratio: 5 / 4; padding: 0; background: #f6f8fa; overflow: hidden; }
.product-card__image img { width: 100%; height: 100%; object-fit: contain; mix-blend-mode: multiply; }
.product-card__body { display: flex; flex: 1; flex-direction: column; padding: 20px 20px 22px; }
.product-card h3 { margin: 0 0 10px; font-size: 1.15rem; letter-spacing: -0.03em; }
.product-card p { margin: 0 0 18px; color: var(--muted); font-size: .89rem; }
.product-card__selling-point { margin: 0 0 18px !important; color: var(--muted) !important; font-size: .88rem !important; line-height: 1.45; }
.product-card__meta { display: flex; flex-wrap: wrap; gap: 7px; margin-top: auto; margin-bottom: 22px; }
.tag { display: inline-flex; padding: 6px 10px; border-radius: 999px; background: var(--surface-blue); color: var(--navy-800); font-size: .75rem; font-weight: 800; }
.product-card .text-link { margin-top: auto; font-size: .9rem; }
.compare-link { display: flex; align-items: center; justify-content: center; gap: 18px; margin: 20px auto 0; color: #0754c7; font-weight: 800; }
.compare-link span:first-child, .compare-link span:last-child { display: block; width: 68px; height: 1px; background: currentColor; opacity: .55; }
.compare-link span:last-child { width: auto; height: auto; background: transparent; opacity: 1; font-size: 1.15rem; }

.selection { padding: 78px 0; background: var(--surface-blue); }
.selection__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.selection__item { position: relative; min-height: 300px; overflow: hidden; border-radius: var(--radius); background: var(--navy-900); color: var(--white); }
.selection__item img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s ease; }
.selection__item:hover img { transform: scale(1.05); }
.selection__item::after { content: ""; position: absolute; inset: 20% 0 0; background: linear-gradient(transparent, rgba(7,24,40,.94)); }
.selection__overlay { position: absolute; z-index: 1; right: 22px; bottom: 20px; left: 22px; }
.selection__temp { display: block; margin-bottom: 5px; color: var(--tuolin-orange); font-size: .74rem; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.selection__overlay strong { display: block; font-size: 1.55rem; line-height: 1.05; }
.selection__overlay small { display: block; margin-top: 5px; color: var(--muted-light); font-size: .88rem; }

.application-preview { padding: 50px 0 82px; background: var(--surface-blue); }
.application-preview__grid { display: grid; grid-template-columns: .78fr 1.62fr; gap: 36px; align-items: center; }
.application-preview__intro h2 { margin: 0 0 16px; font-size: clamp(2rem, 4vw, 3.15rem); line-height: 1.05; letter-spacing: -0.05em; }
.application-preview__intro > p:not(.eyebrow) { max-width: 440px; margin: 0 0 24px; color: var(--muted); }
.application-preview__cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.application-preview__card { position: relative; min-height: 214px; overflow: hidden; border-radius: 9px; background: var(--navy-900); color: var(--white); }
.application-preview__card img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s ease; }
.application-preview__card:hover img { transform: scale(1.05); }
.application-preview__card::after { content: ""; position: absolute; inset: 35% 0 0; background: linear-gradient(transparent, rgba(7,24,40,.94)); }
.application-preview__card > span { position: absolute; z-index: 1; right: 18px; bottom: 16px; left: 18px; }
.application-preview__card strong { display: block; font-size: 1rem; }
.application-preview__card small { display: block; margin-top: 3px; color: var(--muted-light); font-size: .8rem; }

.applications { padding: 110px 0; background: var(--surface); }
.application-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.application-card { position: relative; min-height: 375px; overflow: hidden; border-radius: var(--radius); background: var(--navy-900); color: var(--white); }
.application-card img { width: 100%; height: 100%; object-fit: cover; opacity: .8; transition: transform .45s ease; }
.application-card:hover img { transform: scale(1.05); }
.application-card::after { content: ""; position: absolute; inset: 30% 0 0; background: linear-gradient(transparent, rgba(7,24,40,.96)); }
.application-card__content { position: absolute; z-index: 1; right: 26px; bottom: 24px; left: 26px; }
.application-card h3 { margin: 0 0 6px; font-size: 1.45rem; }
.application-card p { margin: 0; color: var(--muted-light); font-size: .92rem; }
.application-card--intro { display: flex; min-height: 375px; flex-direction: column; justify-content: center; padding: 36px; background: var(--navy-900); }
.application-card--intro::after { display: none; }
.application-card--intro h3 { margin: 0 0 15px; font-size: 2.1rem; line-height: 1.04; }
.application-card--intro p { margin: 0 0 23px; color: var(--muted-light); }

.media-gallery { padding: 110px 0; background: var(--surface-blue); }
.media-gallery__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.media-gallery__card { margin: 0; overflow: hidden; border-radius: var(--radius); background: var(--navy-900); color: var(--white); }
.media-gallery__card img { display: block; width: 100%; height: 250px; object-fit: cover; }
.media-gallery__card figcaption { padding: 18px 18px 20px; }
.media-gallery__card strong { display: block; }
.media-gallery__card span { display: block; margin-top: 5px; color: var(--muted-light); font-size: .86rem; }

.material-applications { padding: 110px 0; background: var(--surface); }
.material-application-list { display: grid; gap: 24px; }
.material-application { display: grid; grid-template-columns: .78fr 1.62fr; gap: 28px; align-items: center; padding: 28px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); box-shadow: 0 10px 30px rgba(9, 28, 51, .04); }
.material-application:nth-child(even) { grid-template-columns: 1.62fr .78fr; }
.material-application:nth-child(even) .material-application__copy { order: 2; }
.material-application__copy h3 { margin: 0 0 14px; font-size: clamp(2rem, 3.2vw, 2.9rem); line-height: 1.02; letter-spacing: -0.055em; text-wrap: balance; }
.material-application--special .material-application__copy h3 { font-size: clamp(1.8rem, 2.65vw, 2.45rem); white-space: nowrap; }
.material-application__copy > p:not(.eyebrow) { margin: 0 0 24px; padding: 12px 14px; border-left: 4px solid var(--tuolin-orange); border-radius: 0 10px 10px 0; background: linear-gradient(90deg, rgba(255, 121, 0, .14), rgba(255, 121, 0, 0)); color: var(--navy-800); font-size: 1.08rem; font-weight: 800; line-height: 1.42; letter-spacing: -0.01em; }
.material-application__selling-points { display: grid; gap: 3px; }
.selling-point-line { display: block; }
.material-application__selling-points--special { gap: 6px; }
/* 卖点标签。尺寸用 em 跟着正文走——它标的是这一句话，不该盖过这句话。
   原来写的是 clamp(1.15rem, 1.65vw, 1.5rem)，在 1280px 下算出来 1.32rem，
   比它标注的正文（1.08rem）还大两成；再加 .1em 字距、900 字重、投影和
   2px 边框，一颗标签就压住了整行，长一点的短语还会被挤成整块折行的
   双层大胶囊。强调交给颜色和底色，尺寸不该参与。 */
.selling-point-highlight {
  display: inline-block;
  padding: 1px 9px 2px;
  border: 1.5px solid #c62828;
  border-radius: 999px;
  background: #fff1ef;
  color: #c62828;
  font-size: .92em;
  font-weight: 800;
  letter-spacing: 0;
  line-height: 1.35;
  /* 万一长短语还是要折行，两截各画各的圆角，
     而不是默认的两条被切平的边 */
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}
.material-application__gallery { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 10px; min-height: 250px; }
.material-application__gallery figure { position: relative; min-height: 250px; margin: 0; overflow: hidden; border-radius: 14px; background: var(--navy-900); }
.material-application__gallery img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s ease; }
.material-application__gallery figure:hover img { transform: scale(1.05); }
.material-application__gallery figcaption { position: absolute; right: 0; bottom: 0; left: 0; padding: 34px 12px 12px; color: var(--white); font-size: .78rem; font-weight: 800; background: linear-gradient(transparent, rgba(7,24,40,.9)); }

.factory { padding: 110px 0; background: var(--white); }
.factory__grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 60px; align-items: center; }
.factory__copy h2 { margin: 0 0 18px; font-size: clamp(2rem, 4vw, 3.2rem); line-height: 1.06; letter-spacing: -0.05em; }
.factory__copy p { max-width: 560px; color: var(--muted); }
.factory__copy .button { margin-top: 12px; }
.factory__gallery { display: grid; grid-template-columns: 1.12fr .88fr; grid-template-rows: repeat(2, minmax(170px, 1fr)); gap: 14px; }
.factory__gallery figure { position: relative; min-height: 190px; margin: 0; overflow: hidden; border-radius: var(--radius); background: var(--navy-900); }
.factory__gallery figure:first-child { grid-row: 1 / -1; }
.factory__gallery img { display: block; width: 100%; height: 100%; object-fit: cover; }
.factory__gallery figcaption { position: absolute; right: 0; bottom: 0; left: 0; padding: 34px 18px 15px; background: linear-gradient(transparent, rgba(7,24,40,.92)); color: var(--white); font-size: .9rem; font-weight: 800; }

.capability { padding: 110px 0; background: var(--navy-900); color: var(--white); }
.capability__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 76px; align-items: start; }
.capability__visual { position: relative; min-height: 430px; overflow: hidden; border-radius: var(--radius); background: var(--navy-800); }
.capability__visual img { width: 100%; height: 100%; object-fit: cover; }
.capability__visual::after { content: ""; position: absolute; inset: 40% 0 0; background: linear-gradient(transparent, rgba(7,24,40,.9)); }
.capability__visual-caption { position: absolute; z-index: 1; right: 24px; bottom: 21px; left: 24px; }
.capability__visual-caption strong { display: block; font-size: 1.3rem; }
.capability__visual-caption span { color: var(--muted-light); font-size: .88rem; }
.capability__copy h2 { margin: 0 0 18px; font-size: clamp(2rem, 4vw, 3.2rem); line-height: 1.06; letter-spacing: -0.05em; }
.capability__copy p { max-width: 560px; color: var(--muted-light); }
.capability__tags { display: flex; flex-wrap: wrap; gap: 9px; margin: 28px 0 31px; }
.capability__tags span { padding: 8px 12px; border: 1px solid rgba(255,255,255,.2); border-radius: 999px; color: var(--muted-light); font-size: .78rem; font-weight: 800; }
.capability-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.capability-item { padding: 22px 0; border-top: 1px solid rgba(255,255,255,.18); }
.capability-item strong { display: block; margin-bottom: 6px; font-size: 1rem; }
.capability-item span { color: var(--muted-light); font-size: .9rem; }

.resources { padding: 106px 0; background: var(--white); }
.resource-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.resource-card { padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); }
.resource-card__icon { width: 42px; height: 42px; display: grid; place-items: center; margin-bottom: 20px; border-radius: 11px; background: var(--surface-blue); color: var(--tuolin-orange-dark); font-size: 1.25rem; font-weight: 900; }
.resource-card h3 { margin: 0 0 8px; font-size: 1.12rem; }
.resource-card p { margin: 0 0 18px; color: var(--muted); font-size: .9rem; }

.faq { padding: 102px 0; background: var(--surface); }
.faq__grid { display: block; }
.faq__intro { margin-bottom: 28px; }
.faq__intro h2 { margin: 0 0 16px; font-size: clamp(2rem, 4vw, 3rem); line-height: 1.05; letter-spacing: -0.05em; }
.faq__intro p { margin: 0; color: var(--muted); }
.accordion { border-top: 1px solid var(--line); }
.accordion details { border-bottom: 1px solid var(--line); }
.accordion summary { display: flex; justify-content: space-between; gap: 22px; padding: 21px 0; cursor: pointer; list-style: none; font-weight: 800; }
.accordion summary::-webkit-details-marker { display: none; }
.accordion summary::after { content: "+"; color: var(--tuolin-orange-dark); font-size: 1.35rem; line-height: 1; }
.accordion details[open] summary::after { content: "−"; }
.accordion p { max-width: 680px; margin: -5px 0 22px; color: var(--muted); font-size: .94rem; }

.cta { padding: 80px 0; background: var(--tuolin-orange); color: var(--white); }
.cta__inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.cta h2 { max-width: 640px; margin: 0; font-size: clamp(2rem, 4vw, 3.4rem); line-height: 1.04; letter-spacing: -0.05em; }
.cta .button { background: var(--navy-900); }
.cta .button:hover { background: var(--navy-800); }

.site-footer { padding: 58px 0 27px; background: var(--navy-950); color: var(--white); }
.footer-grid { display: grid; grid-template-columns: 1.3fr .8fr .8fr 1fr; gap: 42px; padding-bottom: 42px; }
.footer-brand p { max-width: 330px; margin: 18px 0 0; color: var(--muted-light); font-size: .9rem; }
.footer-column h3 { margin: 0 0 15px; color: var(--muted-light); font-size: .76rem; letter-spacing: .14em; text-transform: uppercase; }
.footer-column a, .footer-column span { display: block; margin: 0 0 9px; color: #f1f5f8; font-size: .88rem; }
.footer-column a:hover { color: var(--tuolin-orange); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.15); color: #91a5b8; font-size: .78rem; }

.page-hero { position: relative; overflow: hidden; padding: 95px 0 88px; background: linear-gradient(90deg, rgba(7,24,40,.98) 0%, rgba(7,24,40,.9) 30%, rgba(7,24,40,.58) 58%, rgba(7,24,40,.26) 100%), url("images/optimized/home-hero-product-group-ceramic-special-basalt.webp") center / cover no-repeat; color: var(--white); }
.page-hero--product { padding: 0; overflow: hidden; background: linear-gradient(90deg, var(--navy-900) 0%, var(--navy-900) 48%, #f6f8fa 48%, #f6f8fa 100%); }
.page-hero__product-grid { display: grid; grid-template-columns: .9fr 1.1fr; min-height: 470px; align-items: stretch; gap: 42px; }
.page-hero__product-copy { display: flex; flex-direction: column; justify-content: center; padding: 72px 0; }
.page-hero__product-copy .breadcrumbs { margin-bottom: 30px; }
.page-hero__product-visual { display: grid; min-height: 470px; place-items: center; overflow: hidden; background: #f6f8fa; }
.page-hero__product-visual img { width: 100%; height: 100%; object-fit: contain; mix-blend-mode: multiply; }
.page-hero h1 { max-width: 820px; margin: 0 0 18px; font-size: clamp(2.4rem, 5vw, 4.8rem); line-height: 1; letter-spacing: -0.06em; }
.page-hero p { max-width: 680px; margin: 0; color: var(--muted-light); font-size: 1.1rem; }
.breadcrumbs { margin-bottom: 30px; color: var(--muted-light); font-size: .82rem; }
.breadcrumbs a { color: var(--white); }
.product-intro { padding: 94px 0; }
.product-intro__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; align-items: center; }
.product-main-image { overflow: hidden; border-radius: 22px; background: var(--surface); box-shadow: var(--shadow); }
.product-main-image img { width: 100%; aspect-ratio: 1 / .84; object-fit: contain; }
.product-copy h2 { margin: 0 0 17px; font-size: clamp(2rem, 4vw, 3.3rem); line-height: 1.05; letter-spacing: -0.05em; }
.product-copy > p { margin: 0 0 24px; color: var(--muted); font-size: 1.02rem; }
.product-bullets { display: grid; gap: 13px; margin: 0 0 27px; padding: 0; list-style: none; }
.product-bullets li { position: relative; padding-left: 26px; font-weight: 700; }
.product-bullets li::before { content: "✓"; position: absolute; left: 0; color: var(--tuolin-orange-dark); font-weight: 900; }
.product-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.product-data { padding: 90px 0; background: var(--surface); }
.data-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.data-panel { padding: 29px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); }
.data-panel h3 { margin: 0 0 19px; font-size: 1.2rem; }
.spec-table { width: 100%; border-collapse: collapse; }
.spec-table td { padding: 12px 0; border-bottom: 1px solid var(--line); vertical-align: top; font-size: .91rem; }
.spec-table tr:last-child td { border-bottom: 0; }
.spec-table td:first-child { width: 44%; color: var(--muted); }
.spec-table .data-list { display: grid; gap: 5px; margin: 0; padding: 0; list-style: none; }
.application-strip { padding: 90px 0; background: var(--white); }
.application-strip__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.application-strip figure { margin: 0; overflow: hidden; border-radius: var(--radius); background: var(--navy-900); }
.application-strip img { width: 100%; height: 220px; object-fit: cover; }
.application-strip figcaption { padding: 18px 20px 21px; color: var(--white); font-weight: 800; }
.notice { padding: 16px 18px; border-left: 3px solid var(--tuolin-orange); background: var(--surface-blue); color: var(--navy-800); font-size: .88rem; }
.downloads { display: flex; flex-wrap: wrap; gap: 10px; }
.download-link { display: inline-flex; align-items: center; gap: 8px; padding: 10px 13px; border: 1px solid var(--line); border-radius: 8px; color: var(--navy-800); font-size: .83rem; font-weight: 800; }
.download-link:hover { border-color: var(--tuolin-orange); color: var(--tuolin-orange-dark); }

.contact-layout { display: grid; grid-template-columns: .78fr 1.22fr; gap: 60px; padding: 94px 0 110px; }
.contact-copy h2 { margin: 0 0 16px; font-size: clamp(2rem, 4vw, 3.1rem); line-height: 1.04; letter-spacing: -0.05em; }
.contact-copy > p { margin: 0 0 30px; color: var(--muted); }
.contact-detail { padding: 16px 0; border-top: 1px solid var(--line); }
.contact-detail strong { display: block; margin-bottom: 3px; font-size: .82rem; color: var(--muted); text-transform: uppercase; letter-spacing: .09em; }
.contact-detail a { font-weight: 800; }
.form-card { padding: 32px; border-radius: var(--radius); background: var(--surface); box-shadow: var(--shadow); }
.form-card h2 { margin: 0 0 7px; font-size: 1.6rem; }
.form-card > p { margin: 0 0 24px; color: var(--muted); font-size: .9rem; }
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 17px; }
.field { display: grid; gap: 7px; }
.field--full { grid-column: 1 / -1; }
.field label { color: var(--navy-800); font-size: .82rem; font-weight: 800; }
.field input, .field select, .field textarea { width: 100%; padding: 12px 13px; border: 1px solid #cbd8e3; border-radius: 8px; background: var(--white); color: var(--ink); outline: none; }
.field textarea { min-height: 130px; resize: vertical; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--tuolin-orange); box-shadow: 0 0 0 3px rgba(255,121,0,.13); }
.form-note { margin: 14px 0 0; color: var(--muted); font-size: .76rem; }
.form-status { display: none; margin-top: 18px; padding: 14px 16px; border-radius: 8px; background: #e8f5ec; color: #176b33; font-size: .86rem; }
.form-status.is-visible { display: block; }
.form-status.is-error { background: #fdecec; color: #a52121; }

/* 蜜罐：留在文档里给脚本和自动填充去填，人类既看不到也 tab 不到。
   不用 display:none——部分自动填充会跳过不可见的字段。 */
.rfq-honeypot { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* 表单提交后的落点页。确认与拒绝共用一套版式，只用配色区分成败。
   这一页由后端渲染（不是静态产出），但样式表是站点这一份。 */
.confirm { padding: 92px 0 108px; background: var(--surface); min-height: 62vh; }
.confirm__card { max-width: 640px; margin: 0 auto; padding: 46px 44px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--white); box-shadow: var(--shadow); text-align: center; }
.confirm__mark { display: grid; width: 54px; height: 54px; margin: 0 auto 22px; place-items: center; border-radius: 50%; background: #e8f5ec; color: #176b33; font-size: 1.4rem; font-weight: 800; }
.confirm--rejected .confirm__mark { background: #fdecec; color: #a52121; }
.confirm__card h1 { margin: 0 0 14px; font-size: clamp(1.6rem, 3.4vw, 2.3rem); line-height: 1.12; letter-spacing: -0.04em; }
.confirm__card p { margin: 0 0 18px; color: var(--muted); }
.confirm__card p:last-of-type { margin-bottom: 0; }
.confirm__ref { margin: 26px 0 30px; padding: 18px; border: 1px dashed var(--line); border-radius: 12px; background: var(--surface-blue); }
.confirm__ref span { display: block; margin-bottom: 6px; color: var(--muted); font-size: 0.72rem; font-weight: 800; letter-spacing: 0.18em; text-transform: uppercase; }
.confirm__ref strong { font-size: 1.35rem; letter-spacing: 0.04em; }
.confirm__actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 30px; }
.button--ghost { border-color: var(--line); background: transparent; color: var(--ink); }
.button--ghost:hover { border-color: var(--line); background: var(--surface); color: var(--ink); }
.header-actions--end { margin-left: auto; }
.confirm-footer { padding: 26px 0; background: var(--navy-950); color: #91a5b8; font-size: 0.78rem; }
.confirm-footer .container { display: flex; flex-wrap: wrap; gap: 14px; justify-content: space-between; }
.confirm-footer a:hover { color: var(--tuolin-orange); }
@media (max-width: 640px) {
  .confirm { padding: 62px 0 76px; }
  .confirm__card { padding: 34px 22px; }
}

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

@media (max-width: 980px) {
  .nav { gap: 17px; }
  .header-actions { gap: 8px; }
  .header-actions .button { display: none; }
  .product-grid, .resource-grid { grid-template-columns: repeat(2, 1fr); }
  .application-preview__grid { gap: 28px; }
  .application-grid { grid-template-columns: 1fr 1fr; }
  .media-gallery__grid { grid-template-columns: repeat(2, 1fr); }
  .application-card--intro { grid-column: 1 / -1; min-height: 300px; }
  .factory__grid, .capability__grid, .faq__grid { gap: 40px; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 740px) {
  .container, .hero__content { width: min(calc(100% - 34px), var(--max-width)); }
  .home-page .container, .home-page .hero__content { width: min(calc(100% - 34px), var(--max-width)); }
  .site-header__inner { min-height: 69px; }
  .logo { width: 122px; }
  .menu-toggle { display: block; margin-left: auto; }
  .nav { position: absolute; top: 69px; right: 0; left: 0; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 9px 17px 17px; background: rgba(7,24,40,.98); border-top: 1px solid rgba(255,255,255,.1); }
  .nav.is-open { display: flex; }
  .nav a { padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.1); }
  .header-actions { margin-left: 0; }
  .hero { min-height: 620px; }
  .hero__scene { left: 0; width: 100%; opacity: .52; -webkit-mask-image: none; mask-image: none; }
  .hero__scene::after { background: linear-gradient(180deg, rgba(7,24,40,.9) 0%, rgba(7,24,40,.42) 46%, rgba(7,24,40,.62) 100%); }
  .hero__content { padding: 118px 0 70px; }
  .hero h1 { font-size: clamp(2.7rem, 14vw, 4.2rem); }
  .hero__proof { grid-template-columns: 1fr; gap: 12px; margin-top: 38px; }
  .product-hero .hero__proof { grid-template-columns: 1fr; }
  .page-hero--product { background: var(--navy-900); }
  .page-hero__product-grid { grid-template-columns: 1fr; gap: 0; }
  .page-hero__product-copy { padding: 76px 0 28px; }
  .page-hero__product-visual { min-height: 300px; }
  .products, .applications, .media-gallery, .material-applications, .factory, .capability, .resources, .faq, .product-intro, .application-strip { padding: 76px 0; }
  .product-grid, .selection__grid, .application-grid, .media-gallery__grid, .factory__grid, .factory__gallery, .resource-grid, .capability__grid, .capability-list, .faq__grid, .product-intro__grid, .data-grid, .application-strip__grid, .contact-layout { grid-template-columns: 1fr; }
  .application-preview { padding: 76px 0; }
  .application-preview__grid, .application-preview__cards { grid-template-columns: 1fr; }
  .application-preview__card { min-height: 250px; }
  .selection__item { min-height: 250px; }
  .material-application { grid-template-columns: 1fr !important; gap: 20px; padding: 18px; }
  .material-application:nth-child(even) .material-application__copy { order: initial; }
  .material-application--special .material-application__copy h3 { white-space: normal; }
  .material-application__copy > p:not(.eyebrow) { margin-bottom: 20px; padding: 10px 12px; font-size: 1rem; }
  .material-application__gallery { grid-template-columns: 1fr 1fr; min-height: 190px; }
  .material-application__gallery figure { min-height: 190px; }
  .material-application__gallery figure:last-child { grid-column: 1 / -1; min-height: 210px; }
  .application-card--intro { grid-column: auto; }
  .application-card, .application-card--intro { min-height: 310px; }
  .factory__gallery figure:first-child { grid-row: auto; }
  .media-gallery__card img { height: 220px; }
  .capability__visual { min-height: 320px; }
  .cta { padding: 60px 0; }
  .cta__inner { align-items: flex-start; flex-direction: column; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { align-items: flex-start; flex-direction: column; }
  .form-grid { grid-template-columns: 1fr; }
  .field--full { grid-column: auto; }
  .form-card { padding: 24px 19px; }
  .contact-layout { gap: 45px; padding: 70px 0 80px; }
}