/* ==========================================================================
   DHUV · Precision Atelier
   app.css — 布局、组件、页面
   ========================================================================== */

/* ---------- 蓝图语言 ---------- */
.blueprint {
    position: relative;
    isolation: isolate;
}

.blueprint::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background-image:
        linear-gradient(to right, var(--grid, rgba(11, 12, 14, .045)) 1px, transparent 1px),
        linear-gradient(to bottom, var(--grid, rgba(11, 12, 14, .045)) 1px, transparent 1px);
    background-size: 80px 80px;
    mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, #000 20%, transparent 78%);
    pointer-events: none;
}

.dark.blueprint,
.on-dark.blueprint {
    --grid: rgba(244, 240, 232, .055);
}

/* 四角定位十字 */
.crosshair {
    --cl: 1px;
    --cs: 9px;
    --cc: var(--copper);
    position: relative;
    background-image:
        linear-gradient(var(--cc), var(--cc)), linear-gradient(var(--cc), var(--cc)),
        linear-gradient(var(--cc), var(--cc)), linear-gradient(var(--cc), var(--cc)),
        linear-gradient(var(--cc), var(--cc)), linear-gradient(var(--cc), var(--cc)),
        linear-gradient(var(--cc), var(--cc)), linear-gradient(var(--cc), var(--cc));
    background-repeat: no-repeat;
    background-size:
        var(--cl) var(--cs), var(--cs) var(--cl),
        var(--cl) var(--cs), var(--cs) var(--cl),
        var(--cl) var(--cs), var(--cs) var(--cl),
        var(--cl) var(--cs), var(--cs) var(--cl);
    background-position:
        left top, left top,
        right top, right top,
        left bottom, left bottom,
        right bottom, right bottom;
}

/* 水印编号 */
.watermark {
    position: absolute;
    font-family: var(--f-display);
    font-size: clamp(120px, 18vw, 260px);
    line-height: .8;
    color: var(--t1);
    opacity: .045;
    pointer-events: none;
    user-select: none;
    z-index: 0;
}

.dark .watermark,
.on-dark .watermark {
    color: var(--paper);
    opacity: .06;
}

/* ---------- 滚动进度 ---------- */
.progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 2px;
    width: 0;
    background: var(--signal);
    z-index: 120;
    will-change: width;
}

/* ---------- Header ---------- */
.hdr {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: var(--hdr);
    display: flex;
    align-items: center;
    border-bottom: 1px solid transparent;
    transition: height var(--dur-s) var(--ease), background var(--dur-s), border-color var(--dur-s), color var(--dur-s);
}

.hdr.is-stuck {
    height: 64px;
    background: rgba(244, 240, 232, .88);
    -webkit-backdrop-filter: saturate(180%) blur(16px);
    backdrop-filter: saturate(180%) blur(16px);
    border-bottom-color: var(--line);
}

.hdr--over {
    color: var(--ti1);
}

.hdr--over.is-stuck {
    color: var(--t1);
}

.hdr__in {
    width: 100%;
    max-width: var(--w-max);
    margin-inline: auto;
    padding-inline: var(--pad);
    display: flex;
    align-items: center;
    gap: var(--s5);
}

/* 品牌 */
.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    flex: none;
}

.brand__mark {
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    border: 1px solid currentColor;
    font-family: var(--f-display);
    font-size: 15px;
    letter-spacing: .04em;
    flex: none;
}

.brand__txt {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.brand__name {
    font-family: var(--f-sans);
    font-weight: 600;
    font-size: 14px;
    letter-spacing: .16em;
    text-transform: uppercase;
}

.brand__sub {
    font-family: var(--f-mono);
    font-size: 9.5px;
    letter-spacing: .22em;
    text-transform: uppercase;
    opacity: .55;
    margin-top: 3px;
}

/* 主导航 */
.nav {
    margin-left: auto;
}

.nav__list {
    display: flex;
    align-items: center;
    gap: clamp(14px, 1.8vw, 30px);
}

.nav__item {
    position: relative;
}

.nav__item > a {
    display: inline-block;
    padding: 10px 0;
    font-size: 13.5px;
    font-weight: 500;
    letter-spacing: .02em;
    position: relative;
}

.nav__item > a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 6px;
    width: 100%;
    height: 1px;
    background: currentColor;
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--dur-s) var(--ease);
}

.nav__item:hover > a::after,
.nav__item.is-current > a::after {
    transform: scaleX(1);
    transform-origin: left;
}

/* 下拉 */
.drop {
    position: absolute;
    top: calc(100% + 6px);
    left: -18px;
    min-width: 200px;
    padding: 10px 0;
    background: var(--paper);
    border: 1px solid var(--line);
    box-shadow: var(--sh-2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity var(--dur-s), transform var(--dur-s) var(--ease), visibility var(--dur-s);
}

.has-drop:hover .drop,
.has-drop:focus-within .drop {
    opacity: 1;
    visibility: visible;
    transform: none;
}

.drop a {
    display: block;
    padding: 9px 20px;
    font-size: 13px;
    color: var(--t2);
    transition: color var(--dur-s), background var(--dur-s);
}

.drop a:hover {
    color: var(--signal);
    background: rgba(169, 113, 75, .06);
}

/* Mega 面板 */
.mega {
    position: fixed;
    top: var(--hdr);
    left: 0;
    right: 0;
    background: var(--paper);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--dur-s), transform var(--dur-s) var(--ease), visibility var(--dur-s);
    box-shadow: 0 30px 60px -40px rgba(11, 12, 14, .4);
}

.has-mega:hover .mega,
.has-mega:focus-within .mega {
    opacity: 1;
    visibility: visible;
    transform: none;
}

.mega__in {
    max-width: var(--w-max);
    margin-inline: auto;
    padding: var(--s5) var(--pad) var(--s6);
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: var(--s6);
}

.mega__title {
    font-size: 26px;
    margin: 12px 0 8px;
    letter-spacing: -.02em;
}

.mega__desc {
    font-size: 13px;
    color: var(--t3);
    line-height: 1.65;
    margin-bottom: 18px;
}

.mega__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--line-2);
    border: 1px solid var(--line-2);
}

.mega__grid li {
    background: var(--paper);
}

.mega__grid a {
    display: flex;
    flex-direction: column;
    gap: 4px;
    padding: 20px 18px;
    height: 100%;
    transition: background var(--dur-s);
}

.mega__grid a:hover {
    background: var(--paper-2);
}

.mega__no {
    color: var(--copper);
    font-size: 10px;
    margin-bottom: 6px;
}

.mega__grid strong {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: -.01em;
}

.mega__sub {
    font-size: 11.5px;
    color: var(--t3);
    line-height: 1.5;
    margin-top: 2px;
}

/* 右侧动作区 */
.hdr__act {
    display: flex;
    align-items: center;
    gap: 14px;
    flex: none;
}

/* 语言切换 */
.lang {
    position: relative;
}

.lang__btn {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 7px 10px;
    border: 1px solid currentColor;
    border-color: color-mix(in srgb, currentColor 22%, transparent);
    font-family: var(--f-mono);
    font-size: 11px;
    letter-spacing: .12em;
    transition: border-color var(--dur-s), color var(--dur-s);
}

.lang__btn:hover {
    border-color: var(--copper);
    color: var(--copper);
}

.lang__list {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 176px;
    padding: 8px 0;
    background: var(--paper);
    border: 1px solid var(--line);
    box-shadow: var(--sh-2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity var(--dur-s), transform var(--dur-s) var(--ease), visibility var(--dur-s);
    z-index: 5;
}

.lang.is-open .lang__list {
    opacity: 1;
    visibility: visible;
    transform: none;
}

.lang__list a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 16px;
    font-size: 13px;
    color: var(--t2);
}

.lang__list a:hover,
.lang__list a.is-on {
    color: var(--signal);
    background: rgba(169, 113, 75, .06);
}

.lang__list em {
    font-style: normal;
    font-family: var(--f-mono);
    font-size: 10px;
    letter-spacing: .1em;
    color: var(--t4);
}

/* 汉堡 */
.burger {
    display: none;
    width: 40px;
    height: 40px;
    position: relative;
    margin-left: auto;
}

.burger i {
    position: absolute;
    left: 9px;
    width: 22px;
    height: 1.5px;
    background: currentColor;
    transition: transform var(--dur-s) var(--ease), opacity var(--dur-s);
}

.burger i:nth-child(1) { top: 15px; }
.burger i:nth-child(2) { top: 21px; }
.burger i:nth-child(3) { top: 27px; }

.is-menu .burger i:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.is-menu .burger i:nth-child(2) { opacity: 0; }
.is-menu .burger i:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

/* ---------- 按钮 ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 15px 28px;
    font-family: var(--f-mono);
    font-size: 11.5px;
    letter-spacing: .16em;
    text-transform: uppercase;
    border: 1px solid transparent;
    position: relative;
    overflow: hidden;
    transition: color var(--dur-s), border-color var(--dur-s), background var(--dur-s);
    cursor: pointer;
}

.btn svg {
    flex: none;
    transition: transform var(--dur-s) var(--ease);
}

.btn:hover svg {
    transform: translateX(4px);
}

.btn-solid {
    background: var(--ink);
    color: var(--paper);
    border-color: var(--ink);
}

.btn-solid::before {
    content: "";
    position: absolute;
    inset: 0;
    background: var(--signal);
    transform: translateY(101%);
    transition: transform var(--dur-s) var(--ease);
    z-index: 0;
}

.btn-solid:hover::before {
    transform: none;
}

.btn-solid:hover {
    border-color: var(--signal);
}

.btn-solid > * {
    position: relative;
    z-index: 1;
}

.btn-line {
    border-color: color-mix(in srgb, currentColor 28%, transparent);
    color: inherit;
}

.btn-line:hover {
    background: var(--ink);
    color: var(--paper);
    border-color: var(--ink);
}

.on-dark .btn-line:hover,
.dark .btn-line:hover {
    background: var(--paper);
    color: var(--ink);
    border-color: var(--paper);
}

.btn-signal {
    background: var(--signal);
    color: #fff;
    border-color: var(--signal);
}

.btn-signal:hover {
    background: var(--signal-dk);
    border-color: var(--signal-dk);
}

.btn-sm {
    padding: 11px 20px;
    font-size: 10.5px;
}

/* ---------- 区块 ---------- */
.sec {
    padding-block: clamp(64px, 8.5vw, 136px);
    position: relative;
}

.sec--tight {
    padding-block: clamp(48px, 5vw, 80px);
}

.sec-dark {
    background: var(--ink);
    color: var(--ti1);
}

.sec-paper2 {
    background: var(--paper-2);
}

/* 区块头 */
.shead {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: end;
    gap: var(--s4);
    margin-bottom: clamp(32px, 4vw, 64px);
}

.shead__l {
    max-width: 62ch;
}

.shead__idx {
    display: block;
    margin-bottom: 18px;
}

.shead__title {
    font-size: var(--fs-h2);
    margin-bottom: 14px;
}

.shead__desc {
    color: var(--t3);
    font-size: var(--fs-base);
    max-width: 56ch;
    line-height: 1.7;
}

.dark .shead__desc,
.on-dark .shead__desc {
    color: var(--ti2);
}

/* ---------- Hero ---------- */
.hero {
    position: relative;
    background: var(--ink);
    color: var(--ti1);
    padding-top: calc(var(--hdr) + clamp(48px, 7vw, 96px));
    padding-bottom: clamp(48px, 6vw, 88px);
    overflow: hidden;
}

.hero__grid {
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .65fr);
    gap: clamp(32px, 5vw, 88px);
    align-items: end;
}

.hero__eyebrow {
    margin-bottom: clamp(20px, 2.5vw, 32px);
}

.hero__title {
    font-size: var(--fs-display);
    line-height: .92;
    letter-spacing: -.038em;
    margin-bottom: clamp(20px, 2.6vw, 34px);
}

.hero__title em {
    font-style: italic;
    color: var(--copper-lt);
}

.hero__lead {
    font-size: var(--fs-lg);
    line-height: 1.6;
    color: var(--ti2);
    max-width: 52ch;
    margin-bottom: clamp(26px, 3vw, 40px);
}

.hero__act {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

/* Hero 参数卡 */
.hcard {
    border: 1px solid var(--line-d);
    padding: clamp(20px, 2.4vw, 30px);
    background: rgba(244, 240, 232, .02);
}

.hcard__head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--line-d);
    margin-bottom: 4px;
    color: var(--copper-lt);
}

.hcard__row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 16px;
    padding: 13px 0;
    border-bottom: 1px solid var(--line-d2);
    font-size: 13px;
}

.hcard__row:last-child {
    border-bottom: 0;
}

.hcard__k {
    color: var(--ti3);
    font-family: var(--f-mono);
    font-size: 10.5px;
    letter-spacing: .1em;
    text-transform: uppercase;
    flex: none;
}

.hcard__v {
    text-align: right;
    color: var(--ti1);
}

/* Hero 底部统计 */
.hstats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--line-d2);
    border-top: 1px solid var(--line-d);
    margin-top: clamp(40px, 5vw, 72px);
}

.hstat {
    background: var(--ink);
    padding: 22px 0 0;
}

.hstat__n {
    font-family: var(--f-display);
    font-size: clamp(28px, 3vw, 42px);
    line-height: 1;
    letter-spacing: -.02em;
    display: block;
}

.hstat__l {
    display: block;
    margin-top: 8px;
    font-family: var(--f-mono);
    font-size: 10px;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--ti3);
}

/* 滚动提示 */
.scroll-hint {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--f-mono);
    font-size: 10px;
    letter-spacing: .18em;
    text-transform: uppercase;
    color: var(--ti3);
    margin-top: 40px;
}

.scroll-hint span {
    width: 1px;
    height: 32px;
    background: linear-gradient(var(--copper), transparent);
    animation: drop 2.2s var(--ease-io) infinite;
}

@keyframes drop {
    0% { transform: scaleY(0); transform-origin: top; }
    50% { transform: scaleY(1); transform-origin: top; }
    51% { transform-origin: bottom; }
    100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ---------- 产品卡片 ---------- */
.pgrid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--line);
    border: 1px solid var(--line);
}

.pcard {
    background: var(--paper);
    display: flex;
    flex-direction: column;
    position: relative;
    transition: background var(--dur-s);
}

.pcard:hover {
    background: var(--paper-2);
}

.pcard__media {
    position: relative;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background: var(--paper-2);
}

.pcard__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 1.1s var(--ease);
}

.pcard:hover .pcard__media img {
    transform: scale(1.045);
}

.pcard__no {
    position: absolute;
    top: 14px;
    left: 16px;
    z-index: 2;
    color: var(--copper);
    background: rgba(244, 240, 232, .9);
    padding: 3px 7px;
    font-size: 9.5px;
}

.pcard__body {
    padding: 22px 22px 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
    gap: 8px;
}

.pcard__cat {
    font-family: var(--f-mono);
    font-size: 10px;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--t4);
}

.pcard__title {
    font-size: 21px;
    letter-spacing: -.015em;
    transition: color var(--dur-s);
}

.pcard__desc {
    font-size: 13.5px;
    line-height: 1.62;
    color: var(--t3);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.pcard__foot {
    margin-top: auto;
    padding-top: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-top: 1px solid var(--line-2);
    font-family: var(--f-mono);
    font-size: 10.5px;
    letter-spacing: .1em;
    color: var(--t3);
}

.pcard__arrow {
    width: 26px;
    height: 26px;
    border: 1px solid var(--line);
    display: grid;
    place-items: center;
    transition: background var(--dur-s), border-color var(--dur-s), color var(--dur-s);
}

.pcard:hover .pcard__arrow {
    background: var(--ink);
    border-color: var(--ink);
    color: var(--paper);
}

/* 占位图 */
.ph {
    display: grid;
    place-items: center;
    width: 100%;
    height: 100%;
    background:
        repeating-linear-gradient(45deg, transparent, transparent 6px, rgba(11, 12, 14, .028) 6px, rgba(11, 12, 14, .028) 7px),
        var(--paper-2);
}

.ph i {
    width: 34px;
    height: 34px;
    border: 1px solid var(--line);
    position: relative;
}

.ph i::before,
.ph i::after {
    content: "";
    position: absolute;
    background: var(--line);
}

.ph i::before { left: 50%; top: 6px; bottom: 6px; width: 1px; }
.ph i::after { top: 50%; left: 6px; right: 6px; height: 1px; }

/* ---------- 卖点 ---------- */
.hl {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--line);
    border-top: 1px solid var(--line);
}

.hl__item {
    background: var(--paper);
    padding: clamp(24px, 2.6vw, 34px) clamp(20px, 2.2vw, 28px);
    position: relative;
}

.hl__no {
    font-family: var(--f-mono);
    font-size: 10px;
    letter-spacing: .16em;
    color: var(--copper);
    display: block;
    margin-bottom: 18px;
}

.hl__t {
    font-size: 18px;
    font-family: var(--f-sans);
    font-weight: 600;
    letter-spacing: -.01em;
    margin-bottom: 8px;
    line-height: 1.35;
}

.hl__d {
    font-size: 13.5px;
    line-height: 1.65;
    color: var(--t3);
    margin: 0;
}

/* ---------- 参数表 ---------- */
.specs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: clamp(24px, 3vw, 56px);
}

.spec__cap {
    font-family: var(--f-mono);
    font-size: 10.5px;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--copper);
    padding-bottom: 12px;
    border-bottom: 1px solid var(--ink);
    margin-bottom: 2px;
    display: block;
}

.spec th,
.spec td {
    padding: 13px 0;
    border-bottom: 1px solid var(--line);
    font-size: 14px;
    text-align: left;
    vertical-align: top;
}

.spec th {
    font-weight: 400;
    color: var(--t3);
    width: 46%;
    padding-right: 20px;
}

.spec td {
    color: var(--t1);
    font-variant-numeric: tabular-nums;
    text-align: right;
}

/* ---------- FAQ ---------- */
.faq {
    border-top: 1px solid var(--line);
}

.faq__item {
    border-bottom: 1px solid var(--line);
}

.faq__q {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 24px;
    padding: 22px 0;
    cursor: pointer;
    list-style: none;
    font-size: var(--fs-h4);
    font-family: var(--f-sans);
    font-weight: 500;
    letter-spacing: -.01em;
    line-height: 1.45;
    transition: color var(--dur-s);
}

.faq__q::-webkit-details-marker {
    display: none;
}

.faq__q:hover {
    color: var(--signal);
}

.faq__ico {
    flex: none;
    width: 18px;
    height: 18px;
    margin-top: 4px;
    position: relative;
}

.faq__ico::before,
.faq__ico::after {
    content: "";
    position: absolute;
    background: currentColor;
    transition: transform var(--dur-s) var(--ease);
}

.faq__ico::before { left: 0; right: 0; top: 8px; height: 1px; }
.faq__ico::after { top: 0; bottom: 0; left: 8px; width: 1px; }

.faq__item[open] .faq__ico::after {
    transform: scaleY(0);
}

.faq__a {
    padding: 0 0 24px;
    max-width: 76ch;
    color: var(--t2);
    font-size: 14.5px;
    line-height: 1.78;
}

/* ---------- CTA ---------- */
.cta {
    background: var(--ink);
    color: var(--ti1);
    position: relative;
    overflow: hidden;
}

.cta__in {
    display: grid;
    grid-template-columns: 1.1fr .9fr;
    gap: clamp(32px, 5vw, 80px);
    align-items: start;
}

.cta__title {
    font-size: var(--fs-h1);
    line-height: 1;
    letter-spacing: -.03em;
    margin-bottom: 20px;
}

.cta__title em {
    font-style: italic;
    color: var(--copper-lt);
}

.cta__desc {
    color: var(--ti2);
    max-width: 44ch;
    margin-bottom: 28px;
}

.cta__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 28px;
    padding-top: 24px;
    border-top: 1px solid var(--line-d);
}

.cta__meta dt {
    font-family: var(--f-mono);
    font-size: 10px;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--ti3);
    margin-bottom: 4px;
}

.cta__meta dd {
    margin: 0;
    font-size: 14px;
}

/* ---------- 表单 ---------- */
.inq {
    position: relative;
}

.inq-hp {
    position: absolute;
    left: -9999px;
    width: 1px;
    height: 1px;
    overflow: hidden;
}

.inq-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-bottom: 14px;
}

.inq-f {
    display: flex;
    flex-direction: column;
    gap: 7px;
}

.inq-f > span {
    font-family: var(--f-mono);
    font-size: 10px;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--ti3);
}

.inq-f > span i {
    font-style: normal;
    color: var(--signal);
}

.inq-f input,
.inq-f textarea {
    width: 100%;
    padding: 13px 15px;
    background: rgba(244, 240, 232, .045);
    border: 1px solid var(--line-d);
    color: var(--ti1);
    font-size: 14px;
    border-radius: 0;
    transition: border-color var(--dur-s), background var(--dur-s);
    -webkit-appearance: none;
    appearance: none;
}

.inq-f input::placeholder,
.inq-f textarea::placeholder {
    color: var(--ti3);
}

.inq-f input:focus,
.inq-f textarea:focus {
    outline: none;
    border-color: var(--copper);
    background: rgba(244, 240, 232, .07);
}

.inq-f textarea {
    resize: vertical;
    min-height: 96px;
}

.inq-f-full {
    margin-bottom: 18px;
}

.inq-foot {
    display: flex;
    align-items: center;
    gap: 18px;
    flex-wrap: wrap;
}

.inq-tip {
    font-size: 11.5px;
    color: var(--ti3);
    line-height: 1.5;
}

.inq-note {
    padding: 12px 16px;
    font-size: 13px;
    margin-bottom: 16px;
    border-left: 2px solid var(--copper);
    background: rgba(244, 240, 232, .05);
}

.inq-note.is-err {
    border-left-color: var(--signal);
    color: #FFB4A0;
}

.inq-note.is-ok {
    border-left-color: #4E9E6A;
}

/* 浅色背景下的表单 */
.sec:not(.sec-dark) .inq-f > span {
    color: var(--t3);
}

.sec:not(.sec-dark) .inq-f input,
.sec:not(.sec-dark) .inq-f textarea {
    background: #fff;
    border-color: var(--line);
    color: var(--t1);
}

.sec:not(.sec-dark) .inq-f input::placeholder,
.sec:not(.sec-dark) .inq-f textarea::placeholder {
    color: var(--t4);
}

.sec:not(.sec-dark) .inq-tip {
    color: var(--t3);
}

/* ---------- 面包屑 ---------- */
.crumb {
    padding-block: 18px;
    border-bottom: 1px solid var(--line);
    font-family: var(--f-mono);
    font-size: 10.5px;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--t3);
}

.crumb ol {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
}

.crumb li {
    display: flex;
    align-items: center;
    gap: 8px;
}

.crumb li:not(:last-child)::after {
    content: "/";
    color: var(--t4);
    opacity: .6;
}

.crumb a {
    transition: color var(--dur-s);
}

.crumb a:hover {
    color: var(--signal);
}

.crumb [aria-current] {
    color: var(--t1);
    max-width: 42ch;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ---------- 分页 ---------- */
.pager {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 28px;
    padding-top: var(--s6);
    font-family: var(--f-mono);
    font-size: 11px;
    letter-spacing: .12em;
    text-transform: uppercase;
}

.pager a {
    padding-bottom: 4px;
    border-bottom: 1px solid var(--line);
    transition: border-color var(--dur-s), color var(--dur-s);
}

.pager a:hover {
    color: var(--signal);
    border-color: var(--signal);
}

.pager__num b {
    color: var(--t1);
}

.pager__num {
    color: var(--t4);
}

/* ---------- 页脚 ---------- */
.ftr {
    background: var(--ink);
    color: var(--ti2);
    padding-top: clamp(56px, 7vw, 96px);
    font-size: 13.5px;
}

.ftr__top {
    display: grid;
    grid-template-columns: 1.4fr repeat(3, 1fr);
    gap: clamp(28px, 4vw, 64px);
    padding-bottom: clamp(40px, 5vw, 64px);
    border-bottom: 1px solid var(--line-d);
}

.ftr__brand .brand {
    color: var(--ti1);
    margin-bottom: 18px;
}

.ftr__desc {
    max-width: 34ch;
    color: var(--ti3);
    line-height: 1.7;
    font-size: 13px;
}

.ftr__h {
    font-family: var(--f-mono);
    font-size: 10px;
    letter-spacing: .18em;
    text-transform: uppercase;
    color: var(--copper-lt);
    margin-bottom: 16px;
}

.ftr__list li {
    margin-bottom: 10px;
}

.ftr__list a {
    color: var(--ti2);
    transition: color var(--dur-s), padding-left var(--dur-s);
}

.ftr__list a:hover {
    color: var(--ti1);
    padding-left: 4px;
}

.ftr__info {
    color: var(--ti3);
    line-height: 1.8;
}

.ftr__info a {
    color: var(--ti2);
}

.ftr__info a:hover {
    color: var(--ti1);
}

.ftr__bot {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding-block: 24px;
    font-family: var(--f-mono);
    font-size: 10.5px;
    letter-spacing: .1em;
    color: var(--ti3);
}

.ftr__bot a {
    color: var(--ti3);
}

.ftr__bot a:hover {
    color: var(--ti1);
}

.totop {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: color var(--dur-s);
}

.totop:hover {
    color: var(--ti1);
}

/* ---------- 产品详情 ---------- */
.phero {
    padding-top: clamp(28px, 3vw, 44px);
    padding-bottom: clamp(40px, 5vw, 72px);
    background: var(--paper);
    position: relative;
}

.phero__grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: clamp(28px, 4.5vw, 72px);
    align-items: start;
}

.phero__info {
    padding-top: 8px;
}

.phero__cat {
    font-family: var(--f-mono);
    font-size: 10.5px;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--copper);
    margin-bottom: 16px;
    display: inline-block;
}

.phero__title {
    font-size: var(--fs-h1);
    line-height: 1.02;
    letter-spacing: -.03em;
    margin-bottom: 16px;
}

.phero__tag {
    font-size: var(--fs-lg);
    line-height: 1.6;
    color: var(--t2);
    max-width: 46ch;
    margin-bottom: 28px;
}

.phero__sum {
    border-top: 1px solid var(--ink);
    margin-bottom: 30px;
}

.phero__sum div {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
    font-size: 13.5px;
}

.phero__sum dt {
    font-family: var(--f-mono);
    font-size: 10.5px;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--t3);
}

.phero__sum dd {
    margin: 0;
    text-align: right;
    font-variant-numeric: tabular-nums;
}

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

.phero__media {
    position: relative;
    background: var(--paper-2);
    aspect-ratio: 4 / 3;
    overflow: hidden;
}

.phero__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.phero__badge {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--ink);
    color: var(--ti1);
    padding: 8px 14px;
    font-family: var(--f-mono);
    font-size: 10px;
    letter-spacing: .14em;
    text-transform: uppercase;
    z-index: 2;
}

/* 图集缩略 */
.pgal {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-top: 8px;
}

.pgal button {
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background: var(--paper-2);
    border: 1px solid transparent;
    padding: 0;
    transition: border-color var(--dur-s);
}

.pgal button:hover,
.pgal button.is-on {
    border-color: var(--copper);
}

.pgal img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 左侧导轨 */
.rail {
    position: fixed;
    left: max(12px, calc((100vw - var(--w-max)) / 2 - 26px));
    top: 50%;
    transform: translateY(-50%);
    z-index: 40;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    pointer-events: none;
}

.rail__txt {
    writing-mode: vertical-rl;
    font-family: var(--f-mono);
    font-size: 9.5px;
    letter-spacing: .3em;
    text-transform: uppercase;
    color: var(--t4);
}

.rail__line {
    width: 1px;
    height: 72px;
    background: linear-gradient(var(--copper), transparent);
}

/* ---------- 资讯 ---------- */
.nlist {
    border-top: 1px solid var(--line);
}

.nitem {
    display: grid;
    grid-template-columns: 132px 1fr auto;
    gap: clamp(16px, 3vw, 40px);
    align-items: center;
    padding: clamp(20px, 2.4vw, 30px) 0;
    border-bottom: 1px solid var(--line);
    position: relative;
    transition: background var(--dur-s);
}

.nitem:hover {
    background: var(--paper-2);
}

.nitem__date {
    font-family: var(--f-mono);
    font-size: 11px;
    letter-spacing: .08em;
    color: var(--t3);
    font-variant-numeric: tabular-nums;
}

.nitem__t {
    font-size: clamp(17px, 1.5vw, 22px);
    letter-spacing: -.015em;
    line-height: 1.35;
    margin-bottom: 5px;
    transition: color var(--dur-s);
}

.nitem:hover .nitem__t {
    color: var(--signal);
}

.nitem__d {
    font-size: 13px;
    color: var(--t3);
    line-height: 1.6;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.nitem__arrow {
    width: 34px;
    height: 34px;
    border: 1px solid var(--line);
    display: grid;
    place-items: center;
    transition: background var(--dur-s), border-color var(--dur-s), color var(--dur-s), transform var(--dur-s);
}

.nitem:hover .nitem__arrow {
    background: var(--ink);
    border-color: var(--ink);
    color: var(--paper);
    transform: translateX(4px);
}

/* 资讯详情 */
.article {
    padding-top: clamp(32px, 4vw, 56px);
}

.article__head {
    max-width: 900px;
    margin-bottom: clamp(28px, 3.5vw, 48px);
}

.article__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 18px;
    font-family: var(--f-mono);
    font-size: 10.5px;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--t3);
}

.article__cover {
    aspect-ratio: 16 / 8;
    overflow: hidden;
    background: var(--paper-2);
    margin-bottom: clamp(28px, 3.5vw, 48px);
}

.article__cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.article__body {
    max-width: 760px;
    margin-inline: auto;
}

/* ---------- 通用页面 ---------- */
.page-head {
    padding-top: clamp(36px, 4.5vw, 64px);
    padding-bottom: clamp(28px, 3.5vw, 52px);
    border-bottom: 1px solid var(--line);
}

.page-head__title {
    font-size: var(--fs-h1);
    line-height: 1.04;
    letter-spacing: -.03em;
    max-width: 20ch;
}

.page-head__desc {
    margin-top: 18px;
    max-width: 58ch;
    color: var(--t3);
    font-size: var(--fs-lg);
    line-height: 1.62;
}

/* 两栏：内容 + 侧栏 */
.split {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: clamp(32px, 5vw, 80px);
    align-items: start;
}

.side {
    position: sticky;
    top: calc(var(--hdr) + 24px);
}

.side__box {
    border: 1px solid var(--line);
    padding: 24px;
    background: var(--paper-2);
}

.side__h {
    font-family: var(--f-mono);
    font-size: 10px;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--copper);
    margin-bottom: 14px;
}

/* 信息列表 */
.dl {
    border-top: 1px solid var(--ink);
}

.dl div {
    display: grid;
    grid-template-columns: 160px 1fr;
    gap: 20px;
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
    font-size: 14px;
}

.dl dt {
    font-family: var(--f-mono);
    font-size: 10.5px;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--t3);
    padding-top: 3px;
}

.dl dd {
    margin: 0;
    color: var(--t1);
}

/* 空状态 */
.empty {
    padding: clamp(48px, 8vw, 96px) 0;
    text-align: center;
    color: var(--t3);
}

.empty__t {
    font-size: var(--fs-h3);
    color: var(--t1);
    margin-bottom: 10px;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1180px) {
    .rail {
        display: none;
    }

    .mega__in {
        grid-template-columns: 220px 1fr;
        gap: var(--s4);
    }

    .mega__grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 1024px) {
    .nav {
        display: none;
    }

    .hdr__act {
        margin-left: auto;
    }

    .burger {
        display: block;
    }

    .hdr__act .btn {
        display: none;
    }

    .hero__grid,
    .cta__in,
    .phero__grid {
        grid-template-columns: 1fr;
    }

    .hero__grid {
        gap: var(--s4);
    }

    .hstats {
        grid-template-columns: repeat(2, 1fr);
        gap: 1px;
    }

    .hstat {
        padding: 20px 0 0;
    }

    .pgrid,
    .hl {
        grid-template-columns: repeat(2, 1fr);
    }

    .ftr__top {
        grid-template-columns: 1fr 1fr;
        row-gap: var(--s5);
    }

    .split,
    .split--asym,
    .split--asym2 {
        grid-template-columns: 1fr;
    }

    .flow {
        grid-template-columns: 1fr;
    }

    .nums {
        grid-template-columns: repeat(2, 1fr);
    }

    .pgrid > .pcard:last-child:nth-child(3n+1) {
        grid-column: auto;
    }

    .pgrid > .pcard:last-child:nth-child(3n+1) .pcard__media {
        aspect-ratio: 4 / 3;
    }

    .side {
        position: static;
    }

    .specs {
        grid-template-columns: 1fr;
    }

    .nitem {
        grid-template-columns: 100px 1fr auto;
    }
}

@media (max-width: 720px) {
    :root {
        --hdr: 64px;
    }

    .pgrid,
    .hl,
    .ftr__top,
    .inq-grid,
    .pgal {
        grid-template-columns: 1fr;
    }

    .pgal {
        grid-template-columns: repeat(3, 1fr);
    }

    .shead {
        grid-template-columns: 1fr;
        align-items: start;
    }

    .nitem {
        grid-template-columns: 1fr auto;
        gap: 10px 16px;
    }

    .nitem__date {
        grid-column: 1 / -1;
    }

    .dl div {
        grid-template-columns: 1fr;
        gap: 4px;
    }

    .phero__sum div {
        flex-direction: column;
        gap: 2px;
    }

    .phero__sum dd {
        text-align: left;
    }

    .article__cover {
        aspect-ratio: 4 / 3;
    }

    .cta__meta {
        gap: 18px;
    }

    .hstats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .brand__sub {
        display: none;
    }

    .pgal {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ---------- 应用行业列表 ---------- */
.inds {
    border-top: 1px solid var(--ink);
}

.inds li {
    border-bottom: 1px solid var(--line);
}

.inds a {
    display: flex;
    align-items: center;
    gap: clamp(14px, 2vw, 26px);
    padding: clamp(13px, 1.5vw, 19px) 0;
    font-family: var(--f-display);
    font-size: clamp(21px, 2.2vw, 31px);
    letter-spacing: -.02em;
    transition: color var(--dur-s), padding-left var(--dur-s);
}

.inds a:hover {
    color: var(--signal);
    padding-left: 10px;
}

.inds .mono {
    color: var(--copper);
    flex: none;
}

.inds em {
    margin-left: auto;
    font-style: normal;
    font-size: .66em;
    opacity: 0;
    transform: translateX(-10px);
    transition: opacity var(--dur-s), transform var(--dur-s);
}

.inds a:hover em {
    opacity: 1;
    transform: none;
}

/* ---------- 流程 ---------- */
.flow {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: clamp(24px, 3vw, 40px) clamp(24px, 3vw, 44px);
}

.flow__i {
    position: relative;
    padding-left: 34px;
}

.flow__n {
    position: absolute;
    left: 0;
    top: 3px;
    font-family: var(--f-mono);
    font-size: 10px;
    letter-spacing: .14em;
    color: var(--copper-lt);
}

.flow__t {
    font-family: var(--f-sans);
    font-size: 16px;
    font-weight: 600;
    letter-spacing: -.01em;
    margin-bottom: 6px;
    color: var(--ti1);
}

.flow__d {
    font-size: 13.5px;
    line-height: 1.65;
    color: var(--ti3);
    margin: 0;
}

/* ---------- 数字条 ---------- */
.nums {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--line-d2);
    border-top: 1px solid var(--line-d);
    margin-top: clamp(40px, 5vw, 72px);
}

.nums > div {
    background: var(--ink);
    padding: 26px 0 0;
}

.nums__n {
    display: block;
    font-family: var(--f-display);
    font-size: clamp(26px, 3vw, 40px);
    line-height: 1;
    letter-spacing: -.02em;
}

.nums__l {
    display: block;
    margin-top: 8px;
    font-family: var(--f-mono);
    font-size: 10px;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--ti3);
}

/* ---------- 非对称两栏 ---------- */
.split--asym {
    grid-template-columns: minmax(0, .8fr) minmax(0, 1.2fr);
}

.split--asym2 {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
}

/* ---------- 宽卡片（数量为 3n+1 时最后一张通栏） ---------- */
.pgrid > .pcard:last-child:nth-child(3n+1) {
    grid-column: span 3;
}

.pgrid > .pcard:last-child:nth-child(3n+1) .pcard__media {
    aspect-ratio: 21 / 5;
}

.pgrid > .pcard:last-child:nth-child(3n+1) .pcard__body {
    padding: 26px 28px;
}

/* ---------- 筛选标签 ---------- */
.filters {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: clamp(24px, 3vw, 40px);
}

.filters a {
    padding: 9px 16px;
    border: 1px solid var(--line);
    font-family: var(--f-mono);
    font-size: 10.5px;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--t3);
    transition: color var(--dur-s), background var(--dur-s), border-color var(--dur-s);
}

.filters a:hover {
    border-color: var(--copper);
    color: var(--copper);
}

.filters a.is-on {
    background: var(--ink);
    border-color: var(--ink);
    color: var(--paper);
}

/* ---------- 搜索框 ---------- */
.sform {
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--ink);
}

.sform input {
    flex: 1;
    padding: 14px 0;
    border: 0;
    background: transparent;
    font-size: 16px;
    outline: none;
    min-width: 0;
}

.sform input::placeholder {
    color: var(--t4);
}

.sform button {
    width: 44px;
    height: 44px;
    display: grid;
    place-items: center;
    color: var(--t2);
    transition: color var(--dur-s);
    flex: none;
}

.sform button:hover {
    color: var(--signal);
}

/* ---------- 移动菜单 ---------- */
.mnav {
    position: fixed;
    inset: 0;
    z-index: 95;
    background: var(--ink);
    color: var(--ti1);
    transform: translateY(-100%);
    visibility: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    transition: transform .58s var(--ease), visibility .58s;
}

body.is-menu .mnav {
    transform: none;
    visibility: visible;
}

.mnav__scroll {
    padding: calc(var(--hdr) + 28px) var(--pad) 56px;
    min-height: 100%;
    display: flex;
    flex-direction: column;
}

.mnav__list > li {
    border-bottom: 1px solid var(--line-d2);
}

.mnav__list > li > a {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 0;
    font-family: var(--f-display);
    font-size: clamp(24px, 6vw, 32px);
    letter-spacing: -.02em;
    line-height: 1.2;
}

.mnav__list > li > a em {
    font-family: var(--f-mono);
    font-size: 10px;
    font-style: normal;
    letter-spacing: .16em;
    color: var(--copper);
}

.mnav__sub {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px 18px;
    padding-bottom: 16px;
}

.mnav__sub a {
    display: block;
    padding: 6px 0;
    font-size: 13px;
    color: var(--ti2);
}

.mnav__sub a:active {
    color: var(--copper-lt);
}

.mnav__foot {
    margin-top: auto;
    padding-top: 32px;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.mnav__foot .btn-solid {
    background: var(--paper);
    color: var(--ink);
    border-color: var(--paper);
    width: 100%;
}

.mnav__info {
    display: flex;
    flex-direction: column;
    gap: 4px;
    font-family: var(--f-mono);
    font-size: 11px;
    letter-spacing: .1em;
    color: var(--ti3);
}

.mnav__info a {
    color: var(--ti2);
}

body.is-menu .hdr {
    color: var(--ti1);
    background: transparent;
    border-bottom-color: var(--line-d);
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
}

body.is-menu {
    overflow: hidden;
}

/* ---------- 打印 ---------- */
@media print {
    .hdr, .ftr, .cta, .pgal, .burger, .progress, .rail, .scroll-hint {
        display: none !important;
    }

    body {
        background: #fff;
        color: #000;
    }

    .sec {
        padding-block: 20px;
    }
}