:root {
    --ink: #101212;
    --paper: #f2f3ef;
    --panel: #fafbf8;
    --line: #d7dad3;
    --muted: #72776f;
    --signal: #b9ff32;
    --danger: #d84c3f;
    --mono: "DM Mono", monospace;
    --sans: "Noto Sans SC", sans-serif
}

* {
    box-sizing: border-box
}

html {
    scroll-behavior: smooth
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--sans);
    letter-spacing: 0
}

.noise {
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: .025;
    z-index: 20;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")
}

.site-header {
    height: 72px;
    padding: 0 clamp(24px, 5vw, 76px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--line)
}

.brand {
    display: flex;
    align-items: center;
    gap: 11px;
    color: inherit;
    text-decoration: none;
    font-weight: 800;
    font-size: 17px
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 30px;
    height: 30px;
    background: var(--ink);
    color: var(--signal);
    font-family: var(--mono);
    font-size: 15px
}

.header-status {
    display: flex;
    align-items: center;
    gap: 9px;
    color: var(--muted);
    font: 12px var(--mono)
}

.header-status i {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--signal);
    box-shadow: 0 0 0 4px #dfff9d;
    animation: pulse 2s infinite
}

@keyframes pulse {
    50% {
        box-shadow: 0 0 0 7px transparent
    }
}

main {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(520px, .86fr);
    min-height: calc(100vh - 72px)
}

.intro {
    padding: clamp(42px, 6vw, 88px) clamp(28px, 7vw, 110px) 64px;
    overflow: hidden
}

.eyebrow {
    display: flex;
    align-items: center;
    gap: 16px;
    font: 11px var(--mono);
    color: var(--muted)
}

.eyebrow b {
    font-weight: 500;
    color: var(--ink);
    background: var(--signal);
    padding: 4px 7px
}

.intro h1 {
    font-size: clamp(52px, 6vw, 92px);
    line-height: 1.02;
    margin: 28px 0 24px;
    font-weight: 800
}

.intro h1 em {
    font-style: normal;
    color: transparent;
    -webkit-text-stroke: 1.5px var(--ink)
}

.lead {
    max-width: 550px;
    font-size: 16px;
    line-height: 1.9;
    color: #5e635c;
    margin: 0
}

.stats {
    display: flex;
    margin: 38px 0 48px;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    max-width: 570px
}

.stats div {
    padding: 18px 26px 18px 0;
    min-width: 125px
}

.stats div+div {
    border-left: 1px solid var(--line);
    padding-left: 26px
}

.stats strong,
.stats span {
    display: block
}

.stats strong {
    font: 500 20px var(--mono)
}

.stats span {
    font-size: 11px;
    color: var(--muted);
    margin-top: 5px
}

.product-board {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.7fr) minmax(150px, .72fr);
    gap: 10px;
    max-width: 760px;
    height: 350px
}

.product-visual {
    position: relative;
    min-width: 0;
    height: 100%;
    background: #222;
    overflow: hidden
}

.product-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: saturate(.68) contrast(1.08)
}

.product-visual:after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(10, 12, 11, .28), transparent 50%)
}

.scan-line {
    position: absolute;
    left: 0;
    right: 0;
    top: 34%;
    height: 1px;
    background: var(--signal);
    z-index: 2;
    opacity: .8;
    box-shadow: 0 0 12px var(--signal)
}

.product-tag {
    position: absolute;
    z-index: 3;
    background: rgba(14, 16, 15, .86);
    backdrop-filter: blur(6px);
    color: white;
    padding: 8px 11px;
    font: 11px var(--mono);
    border-left: 2px solid var(--signal)
}

.product-tag span {
    color: var(--signal);
    margin-right: 7px
}

.tag-one {
    top: 20%;
    left: 7%
}

.tag-two {
    top: 52%;
    right: 6%
}

.sample-stack {
    display: grid;
    grid-template-rows: repeat(2, minmax(0, 1fr));
    gap: 10px;
    min-width: 0;
    min-height: 0;
    overflow: hidden
}

.sample-item {
    position: relative;
    min-height: 0;
    margin: 0;
    overflow: hidden;
    background: #dfe1dc
}

.sample-item img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: saturate(.45) contrast(1.04);
    transition: transform .45s ease, filter .45s ease
}

.sample-item:first-child img {
    object-position: center 72%
}

.sample-item:last-child img {
    object-position: center 68%
}

.sample-item:hover img {
    transform: scale(1.035);
    filter: saturate(.8) contrast(1.04)
}

.product-gallery {
    display: grid;
    grid-template-columns: 1.05fr .95fr 1fr;
    grid-template-rows: repeat(2, minmax(0, 1fr));
    gap: 10px;
    max-width: 760px;
    height: 310px;
    margin-top: 10px
}

.product-gallery figure {
    min-width: 0;
    margin: 0;
    overflow: hidden;
    background: #dfe1dc
}

.product-gallery img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: saturate(.52) contrast(1.04);
    transition: transform .45s ease, filter .45s ease
}

.product-gallery figure:first-child img {
    object-position: center 68%
}

.product-gallery figure:nth-child(3) img {
    object-position: center 70%
}

.product-gallery figure:nth-child(4) img {
    object-position: center 68%
}

.product-gallery figure:nth-child(5) img {
    object-position: center 62%
}

.product-gallery figure:nth-child(6) img {
    object-position: center 52%
}

.product-gallery figure:hover img {
    transform: scale(1.025);
    filter: saturate(.82) contrast(1.04)
}

.form-panel {
    background: var(--panel);
    border-left: 1px solid var(--line);
    padding: clamp(38px, 5vw, 70px) clamp(26px, 5vw, 74px) 60px
}

.form-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-bottom: 28px;
    border-bottom: 2px solid var(--ink)
}

.step-label,
.form-index {
    font: 10px var(--mono);
    color: var(--muted)
}

.form-head h2 {
    font-size: 26px;
    margin: 8px 0 0
}

.form-index {
    border: 1px solid var(--line);
    padding: 7px 9px
}

fieldset {
    border: 0;
    padding: 0;
    margin: 0
}

.field-group {
    padding: 28px 0;
    border-bottom: 1px solid var(--line)
}

legend {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 9px;
    font-weight: 700;
    font-size: 15px;
    margin-bottom: 18px
}

legend>span {
    font: 10px var(--mono);
    color: var(--muted)
}

legend>b {
    margin-left: auto;
    font-size: 10px;
    font-weight: 500;
    color: #72776f
}

legend small {
    margin-left: auto;
    color: var(--muted);
    font-size: 10px;
    font-weight: 400
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    margin-bottom: 13px
}

.category-grid input {
    position: absolute;
    opacity: 0
}

.category-grid label {
    position: relative;
    min-height: 78px;
    border: 1px solid var(--line);
    padding: 12px 8px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: .2s;
    background: white
}

.category-grid label:hover {
    border-color: #8f948b
}

.category-grid label:has(input:checked) {
    border-color: var(--ink);
    background: var(--ink);
    color: white
}

.category-grid label:has(input:focus-visible) {
    outline: 2px solid var(--signal);
    outline-offset: 2px
}

.category-grid label:has(input:checked):after {
    content: "✓";
    position: absolute;
    right: 8px;
    top: 6px;
    color: var(--signal);
    font-size: 11px
}

.category-icon {
    font: 20px var(--mono);
    color: #80857c
}

.category-grid label:has(input:checked) .category-icon {
    color: var(--signal)
}

.category-grid strong {
    font-size: 12px
}

.input-wrap {
    position: relative;
    background: white;
    border: 1px solid var(--line);
    padding: 8px 14px
}

.input-wrap:focus-within {
    border-color: var(--ink)
}

.input-wrap label {
    display: block;
    color: var(--muted);
    font-size: 9px;
    margin-bottom: 2px
}

.input-wrap input {
    width: 100%;
    border: 0;
    outline: 0;
    background: transparent;
    font: 14px var(--sans);
    padding: 4px 0;
    color: var(--ink)
}

.focus-corner {
    position: absolute;
    right: -1px;
    bottom: -1px;
    width: 9px;
    height: 9px;
    border-right: 2px solid var(--ink);
    border-bottom: 2px solid var(--ink);
    opacity: 0
}

.input-wrap:focus-within .focus-corner {
    opacity: 1
}

.rating-row {
    display: flex;
    align-items: center;
    justify-content: space-between
}

.rating {
    display: flex;
    gap: 5px
}

.rating button {
    border: 0;
    background: none;
    color: #d4d7d0;
    font-size: 30px;
    padding: 0 2px;
    cursor: pointer;
    transition: transform .15s, color .15s
}

.rating button:hover {
    transform: translateY(-2px)
}

.rating button.active {
    color: var(--ink)
}

.rating button.active:last-of-type {
    color: #94d900
}

.rating-copy {
    text-align: right
}

.rating-copy strong,
.rating-copy span {
    display: block
}

.rating-copy strong {
    font-size: 13px
}

.rating-copy span {
    font-size: 10px;
    color: var(--muted);
    margin-top: 4px
}

.reason-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    margin-bottom: 12px
}

.reason-tags button {
    border: 1px solid var(--line);
    background: white;
    padding: 7px 11px;
    font: 11px var(--sans);
    cursor: pointer;
    color: #5f645d
}

.reason-tags button:hover,
.reason-tags button.active {
    border-color: var(--ink);
    background: #edfeca;
    color: var(--ink)
}

.textarea-wrap {
    position: relative
}

.textarea-wrap textarea {
    width: 100%;
    min-height: 126px;
    resize: vertical;
    border: 1px solid var(--line);
    background: white;
    padding: 14px 14px 32px;
    outline: 0;
    font: 13px/1.7 var(--sans);
    color: var(--ink)
}

.textarea-wrap textarea:focus {
    border-color: var(--ink)
}

.char-count {
    position: absolute;
    right: 12px;
    bottom: 10px;
    font: 10px var(--mono);
    color: var(--muted)
}

.char-count b {
    font-weight: 500;
    color: var(--ink)
}

.agreement {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin: 24px 0 0;
    cursor: pointer;
    color: #666b64;
    font-size: 11px;
    line-height: 1.6
}

.agreement input {
    position: absolute;
    opacity: 0
}

.checkmark {
    flex: 0 0 18px;
    height: 18px;
    border: 1px solid #aeb2aa;
    color: transparent;
    display: grid;
    place-items: center;
    font-size: 10px
}

.agreement input:checked+.checkmark {
    background: var(--ink);
    border-color: var(--ink);
    color: var(--signal)
}

.submit-button {
    width: 100%;
    height: 58px;
    margin-top: 22px;
    border: 0;
    background: var(--ink);
    color: white;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font: 600 14px var(--sans);
    cursor: pointer;
    transition: .2s
}

.submit-button:hover {
    background: #252a25
}

.submit-button:disabled {
    cursor: wait;
    opacity: .68
}

.submit-button b {
    display: grid;
    place-items: center;
    width: 30px;
    height: 30px;
    background: var(--signal);
    color: var(--ink);
    font-size: 16px
}

.privacy {
    text-align: center;
    color: #92968e;
    font-size: 9px;
    margin: 11px 0 0
}

.error {
    color: var(--danger);
    font-size: 10px;
    margin: 7px 0 0;
    min-height: 0
}

.toast {
    position: fixed;
    right: 26px;
    bottom: 26px;
    z-index: 30;
    background: var(--ink);
    color: white;
    padding: 18px 22px;
    display: flex;
    gap: 13px;
    align-items: flex-start;
    box-shadow: 0 14px 40px rgba(0, 0, 0, .24);
    transform: translateY(140%);
    opacity: 0;
    transition: .35s
}

.toast.show {
    transform: none;
    opacity: 1
}

.toast>span {
    color: var(--signal);
    font-size: 18px
}

.toast strong {
    font-size: 13px
}

.toast p {
    margin: 4px 0 0;
    color: #aeb3aa;
    font-size: 10px
}

.toast.error-toast>span {
    color: #ff776c
}

.site-footer {
    padding: 30px clamp(24px, 5vw, 76px);
    color: #d8dcd4;
    background: var(--ink);
    border-top: 3px solid var(--signal)
}

.footer-inner {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 30px;
    max-width: 1600px;
    margin: 0 auto
}

.footer-brand strong,
.footer-brand span {
    display: block
}

.footer-brand strong {
    color: #fff;
    font-size: 18px
}

.footer-brand span {
    margin-top: 6px;
    color: #858b82;
    font: 9px var(--mono)
}

.footer-right {
    text-align: right
}

.filing-links {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 11px
}

.filing-links a {
    color: #c4c9c0;
    font-size: 10px;
    text-decoration: none;
    transition: color .2s
}

.filing-links a:hover {
    color: var(--signal)
}

.filing-links i {
    width: 1px;
    height: 10px;
    background: #4d524c
}

.footer-right p {
    margin: 8px 0 0;
    color: #747a72;
    font: 9px var(--mono)
}

@media(max-width:1050px) {
    main {
        grid-template-columns: 1fr
    }

    .form-panel {
        border-left: 0;
        border-top: 1px solid var(--line)
    }

    .intro {
        display: grid;
        grid-template-columns: 1fr 1fr;
        column-gap: 36px
    }

    .eyebrow,
    .intro h1,
    .lead,
    .stats {
        grid-column: 1
    }

    .product-board {
        grid-column: 2;
        grid-row: 1/5;
        align-self: end;
        grid-template-columns: minmax(0, 1fr) 130px;
        height: 360px
    }

    .product-gallery {
        grid-column: 1/-1;
        width: 100%;
        max-width: none;
        height: 290px;
        margin-top: 24px
    }

    .intro h1 {
        font-size: 64px
    }

    .stats {
        margin-bottom: 0
    }
}

@media(max-width:720px) {
    .site-header {
        height: 60px;
        padding: 0 18px
    }

    .header-status {
        font-size: 9px
    }

    main {
        min-height: calc(100vh - 60px)
    }

    .intro {
        display: block;
        padding: 36px 18px 34px
    }

    .intro h1 {
        font-size: 48px;
        margin-top: 23px
    }

    .lead {
        font-size: 14px
    }

    .stats {
        margin: 28px 0
    }

    .stats div {
        padding: 14px 12px 14px 0;
        min-width: 0;
        flex: 1
    }

    .stats div+div {
        padding-left: 12px
    }

    .stats strong {
        font-size: 16px
    }

    .product-board {
        grid-template-columns: minmax(0, 1.45fr) minmax(112px, .75fr);
        height: 290px
    }

    .product-gallery {
        height: 229px;
        margin-top: 9px
    }

    .product-visual {
        height: 100%
    }

    .form-panel {
        padding: 36px 18px 44px
    }

    .form-head h2 {
        font-size: 22px
    }

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

    .category-grid label {
        min-height: 70px
    }

    .rating-row {
        align-items: flex-end
    }

    .rating button {
        font-size: 27px
    }

    .rating-copy span {
        display: none
    }

    .toast {
        left: 14px;
        right: 14px;
        bottom: 14px
    }

    .site-footer {
        padding: 25px 18px
    }

    .footer-inner {
        align-items: flex-start;
        flex-direction: column;
        gap: 20px
    }

    .footer-right {
        width: 100%;
        text-align: left
    }

    .filing-links {
        justify-content: flex-start
    }

}

@media(max-width:380px) {
    .brand {
        font-size: 14px
    }

    .header-status {
        font-size: 0
    }

    .header-status:after {
        content: "通道开放";
        font-size: 9px
    }

    .intro h1 {
        font-size: 42px
    }

    .stats span {
        font-size: 9px
    }

    .rating-copy {
        display: none
    }

    .product-board {
        grid-template-columns: minmax(0, 1.3fr) minmax(96px, .7fr);
        gap: 7px;
        height: 250px
    }

    .sample-stack {
        gap: 7px
    }

    .product-gallery {
        gap: 7px;
        height: 187px;
        margin-top: 7px
    }

}

.input-wrap+.input-wrap {
    margin-top: 10px
}

.price-field {
    margin-top: 14px
}

.price-label {
    display: block;
    margin-bottom: 8px;
    color: var(--muted);
    font-size: 10px
}

.price-range {
    display: grid;
    grid-template-columns: 1fr 28px 1fr;
    align-items: center
}

.price-range .input-wrap {
    margin-top: 0
}

.price-input {
    display: grid;
    grid-template-columns: auto 1fr;
    column-gap: 7px
}

.price-input label {
    grid-column: 1/-1
}

.price-input .currency {
    font: 13px var(--mono);
    align-self: center
}

.price-input input {
    min-width: 0
}

.range-line {
    text-align: center;
    color: var(--muted);
    font-size: 11px
}

@media(prefers-reduced-motion:reduce) {
    * {
        scroll-behavior: auto !important;
        animation: none !important;
        transition: none !important
    }
}