:root {
    --ink: #16382a;
    --ink-soft: #456456;
    --green: #176b43;
    --green-dark: #0f4f35;
    --green-light: #dcebdd;
    --lime: #d8e86d;
    --cream: #f7f4e9;
    --paper: #fffdf8;
    --line: #dbe3db;
    --warning: #a66a13;
    --shadow: 0 22px 70px rgba(22, 56, 42, 0.10);
    --radius: 22px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    color: var(--ink);
    background: var(--paper);
    font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif;
    line-height: 1.7;
}

a {
    color: inherit;
    text-decoration: none;
}

button,
input,
select,
textarea {
    font: inherit;
}

.shell {
    width: min(1160px, calc(100% - 40px));
    margin: 0 auto;
}

.narrow {
    width: min(820px, calc(100% - 40px));
}

.site-header {
    position: sticky;
    z-index: 20;
    top: 0;
    border-bottom: 1px solid rgba(22, 56, 42, 0.08);
    background: rgba(255, 253, 248, 0.94);
    backdrop-filter: blur(18px);
}

.header-inner {
    display: flex;
    min-height: 78px;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
}

.brand-mark,
.answer-avatar {
    display: inline-grid;
    width: 42px;
    height: 42px;
    place-items: center;
    border-radius: 13px;
    color: var(--cream);
    background: var(--green);
    font-family: "STKaiti", "KaiTi", serif;
    font-size: 21px;
    font-weight: 700;
}

.brand strong,
.brand small {
    display: block;
}

.brand strong {
    line-height: 1.2;
}

.brand small {
    margin-top: 3px;
    color: #769080;
    font-size: 10px;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.nav {
    display: flex;
    align-items: center;
    gap: 32px;
    color: var(--ink-soft);
    font-size: 14px;
}

.nav a {
    transition: color 160ms ease;
}

.nav a:hover,
.nav a:focus-visible {
    color: var(--green);
}

.hero {
    position: relative;
    overflow: hidden;
    background:
        radial-gradient(circle at 78% 10%, rgba(216, 232, 109, 0.25), transparent 28%),
        linear-gradient(145deg, #f8f5e9 0%, #f9fcf3 65%, #f1f6e8 100%);
}

.hero::before {
    position: absolute;
    top: 0;
    right: 0;
    width: 44%;
    height: 100%;
    border-left: 1px solid rgba(23, 107, 67, 0.08);
    content: "";
}

.hero-grid {
    display: grid;
    min-height: 650px;
    align-items: center;
    grid-template-columns: 1.12fr 0.88fr;
    gap: 70px;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 15px;
    color: var(--green);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.eyebrow::before {
    width: 24px;
    height: 2px;
    background: currentColor;
    content: "";
}

.eyebrow-light {
    color: var(--lime);
}

.hero h1,
.page-hero h1,
.result-hero h1 {
    margin: 0;
    font-family: "STSong", "SimSun", serif;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.16;
}

.hero h1 {
    max-width: 690px;
    font-size: clamp(46px, 5.2vw, 72px);
}

.hero h1 em {
    color: var(--green);
    font-style: normal;
}

.hero-lead {
    max-width: 610px;
    margin: 26px 0 30px;
    color: var(--ink-soft);
    font-size: 17px;
}

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

.button {
    display: inline-flex;
    min-height: 48px;
    align-items: center;
    justify-content: center;
    gap: 28px;
    padding: 0 24px;
    border: 1px solid transparent;
    border-radius: 999px;
    cursor: pointer;
    font-weight: 700;
    transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

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

.button-primary {
    color: white;
    background: var(--green);
}

.button-primary:hover {
    background: var(--green-dark);
}

.button-secondary {
    border-color: #bfd0c3;
    background: rgba(255, 255, 255, 0.58);
}

.button-secondary:hover {
    border-color: var(--green);
}

.button-large {
    min-height: 56px;
    padding-inline: 30px;
}

.hero-note {
    display: flex;
    align-items: center;
    gap: 9px;
    margin-top: 28px;
    color: #668072;
    font-size: 13px;
}

.hero-note span {
    color: #72a04c;
    font-size: 9px;
}

.hero-visual {
    position: relative;
    min-height: 450px;
}

.visual-orbit {
    position: absolute;
    border: 1px solid rgba(23, 107, 67, 0.18);
    border-radius: 50%;
}

.orbit-one {
    inset: 30px 20px 20px 40px;
}

.orbit-two {
    inset: 84px 72px 78px 96px;
}

.leaf-card,
.mini-card {
    position: absolute;
    box-shadow: var(--shadow);
}

.leaf-card-main {
    top: 106px;
    left: 50%;
    display: flex;
    width: 218px;
    min-height: 250px;
    align-items: center;
    flex-direction: column;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.5);
    border-radius: 110px 24px 110px 24px;
    color: white;
    background: linear-gradient(145deg, #1d7b4d, #0f4f35);
    transform: translateX(-50%) rotate(-5deg);
}

.leaf-symbol {
    display: grid;
    width: 86px;
    height: 86px;
    margin-bottom: 18px;
    place-items: center;
    border-radius: 50%;
    color: var(--green-dark);
    background: var(--lime);
    font-family: "STKaiti", "KaiTi", serif;
    font-size: 42px;
}

.leaf-card strong {
    font-size: 20px;
}

.leaf-card small {
    color: rgba(255, 255, 255, 0.68);
}

.mini-card {
    z-index: 2;
    min-width: 132px;
    padding: 17px 20px;
    border: 1px solid rgba(23, 107, 67, 0.08);
    border-radius: 18px;
    background: rgba(255, 253, 248, 0.95);
}

.mini-card span,
.mini-card small {
    display: block;
}

.mini-card span {
    color: var(--green);
    font-family: Georgia, serif;
    font-size: 18px;
    font-weight: 700;
}

.mini-card small {
    color: #779083;
    font-size: 11px;
}

.mini-card-top {
    top: 70px;
    right: 0;
}

.mini-card-bottom {
    bottom: 64px;
    left: 10px;
}

.section {
    padding: 90px 0;
}

.section-soft {
    background: var(--cream);
}

.section-heading {
    max-width: 650px;
    margin-bottom: 42px;
}

.section-heading h2,
.feature-panel h2,
.result-card h2,
.result-cta h2 {
    margin: 0 0 14px;
    font-family: "STSong", "SimSun", serif;
    font-size: clamp(30px, 4vw, 44px);
    line-height: 1.25;
}

.section-heading p,
.feature-panel p {
    margin: 0;
    color: var(--ink-soft);
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
}

.step-card {
    min-height: 250px;
    padding: 30px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: white;
}

.step-number {
    display: block;
    margin-bottom: 45px;
    color: #7a9b87;
    font-family: Georgia, serif;
    font-size: 13px;
}

.step-card h3 {
    margin: 0 0 12px;
    font-size: 20px;
}

.step-card p {
    margin: 0;
    color: var(--ink-soft);
    font-size: 14px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.feature-panel {
    min-height: 360px;
    padding: 52px;
    border: 1px solid var(--line);
    border-radius: 30px;
    background: var(--paper);
}

.feature-panel-dark {
    color: white;
    border-color: var(--green-dark);
    background:
        radial-gradient(circle at 90% 0%, rgba(216, 232, 109, 0.17), transparent 32%),
        var(--green-dark);
}

.feature-panel-dark p {
    color: rgba(255, 255, 255, 0.7);
}

.text-link {
    display: inline-flex;
    gap: 16px;
    margin-top: 38px;
    color: var(--green);
    font-weight: 700;
}

.text-link-light {
    color: var(--lime);
}

.page-hero {
    padding: 72px 0 55px;
    border-bottom: 1px solid var(--line);
    background:
        radial-gradient(circle at 80% 0%, rgba(216, 232, 109, 0.2), transparent 25%),
        var(--cream);
}

.page-hero h1 {
    font-size: clamp(40px, 6vw, 62px);
}

.page-hero p {
    max-width: 680px;
    margin: 20px 0 0;
    color: var(--ink-soft);
}

.back-link {
    display: block;
    margin-bottom: 40px;
    color: #6f8779;
    font-size: 13px;
}

.back-link-light {
    color: rgba(255, 255, 255, 0.7);
}

.section-form {
    padding-top: 55px;
}

.diagnosis-form {
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 28px;
    background: white;
    box-shadow: var(--shadow);
}

.form-step {
    display: grid;
    align-items: center;
    padding: 28px 34px;
    border-bottom: 1px solid var(--line);
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.form-step-wide {
    align-items: start;
}

.form-step-label {
    display: flex;
    align-items: flex-start;
    gap: 16px;
}

.form-step-label > span {
    display: grid;
    flex: 0 0 34px;
    width: 34px;
    height: 34px;
    place-items: center;
    border-radius: 50%;
    color: var(--green);
    background: var(--green-light);
    font-size: 13px;
    font-weight: 700;
}

.form-step-label strong,
.form-step-label small {
    display: block;
}

.form-step-label small {
    margin-top: 3px;
    color: #789083;
    font-size: 12px;
}

.field-control select,
.field-control textarea,
.chat-form textarea {
    width: 100%;
    border: 1px solid #cbd8ce;
    border-radius: 13px;
    color: var(--ink);
    outline: none;
    background: #fbfcf8;
}

.field-control select {
    height: 52px;
    padding: 0 14px;
}

.field-control textarea,
.chat-form textarea {
    padding: 14px 16px;
    resize: vertical;
}

.field-control select:focus,
.field-control textarea:focus,
.chat-form textarea:focus {
    border-color: var(--green);
    box-shadow: 0 0 0 3px rgba(23, 107, 67, 0.1);
}

.field-error,
.form-alert {
    color: #a13e35;
    font-size: 13px;
}

.form-alert {
    padding: 16px 24px;
    background: #fff0ed;
}

.form-submit {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 28px 34px;
    background: #f4f7f0;
}

.form-submit p {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0;
    color: #6d8175;
    font-size: 12px;
}

.form-submit p span {
    display: grid;
    width: 20px;
    height: 20px;
    place-items: center;
    border: 1px solid #aabdaf;
    border-radius: 50%;
    font-family: Georgia, serif;
}

.result-hero {
    padding: 55px 0 70px;
    color: white;
    background:
        radial-gradient(circle at 85% 0%, rgba(216, 232, 109, 0.18), transparent 30%),
        var(--green-dark);
}

.result-topline {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.result-chip {
    padding: 7px 13px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 999px;
    color: rgba(255, 255, 255, 0.72);
    font-size: 12px;
}

.result-title-grid {
    display: grid;
    align-items: end;
    grid-template-columns: 1fr 250px;
    gap: 70px;
}

.result-hero h1 {
    font-size: clamp(42px, 6vw, 68px);
}

.result-hero h1 + p {
    max-width: 700px;
    margin: 22px 0 0;
    color: rgba(255, 255, 255, 0.7);
}

.confidence-card {
    padding: 24px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.06);
}

.confidence-card strong {
    display: block;
    color: var(--lime);
    font-family: Georgia, serif;
    font-size: 46px;
    line-height: 1;
}

.confidence-card strong small {
    font-size: 20px;
}

.confidence-card > span {
    display: block;
    margin-top: 7px;
    font-size: 13px;
}

.confidence-track {
    height: 5px;
    margin: 20px 0 10px;
    overflow: hidden;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.13);
}

.confidence-track span {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: var(--lime);
}

.confidence-card > small {
    color: rgba(255, 255, 255, 0.55);
    font-size: 10px;
}

.result-section {
    background: #f5f5ed;
}

.result-layout {
    display: grid;
    align-items: start;
    grid-template-columns: 1fr 330px;
    gap: 24px;
}

.result-main {
    display: grid;
    gap: 18px;
}

.result-card,
.aside-card,
.answer-card,
.chat-form {
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: white;
}

.result-card {
    padding: 38px;
}

.result-card h2 {
    font-size: 30px;
}

.result-card > p {
    color: var(--ink-soft);
}

.result-card-accent {
    border-color: #cbdcae;
    background: #fbfdef;
}

.card-kicker {
    display: block;
    margin-bottom: 13px;
    color: #71907e;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.evidence-list {
    display: grid;
    margin: 25px 0 0;
    padding: 0;
    list-style: none;
    gap: 12px;
}

.evidence-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    color: var(--ink-soft);
}

.evidence-list li span {
    display: grid;
    flex: 0 0 24px;
    width: 24px;
    height: 24px;
    place-items: center;
    border-radius: 50%;
    color: var(--green);
    background: var(--green-light);
    font-size: 11px;
    font-weight: 700;
}

.notice {
    margin-top: 28px;
    padding: 20px;
    border-left: 3px solid var(--warning);
    background: rgba(255, 255, 255, 0.64);
}

.notice strong {
    color: var(--warning);
}

.notice p {
    margin: 5px 0 0;
    color: var(--ink-soft);
    font-size: 13px;
}

.result-aside {
    position: sticky;
    top: 100px;
    display: grid;
    gap: 16px;
}

.aside-card {
    padding: 25px;
}

.aside-card dl,
.aside-card dd {
    margin: 0;
}

.aside-card dl > div {
    padding: 13px 0;
    border-bottom: 1px solid #edf0eb;
}

.aside-card dl > div:last-child {
    border-bottom: 0;
}

.aside-card dt {
    color: #829289;
    font-size: 11px;
}

.aside-card dd {
    font-size: 14px;
    font-weight: 700;
}

.alternative-list {
    display: grid;
    gap: 14px;
}

.alternative-list > div {
    padding-top: 14px;
    border-top: 1px solid #edf0eb;
}

.alternative-list p {
    margin: 4px 0 0;
    color: #718178;
    font-size: 12px;
}

.source-card {
    background: var(--cream);
}

.source-card p {
    margin: 0 0 12px;
    font-size: 13px;
}

.source-card a,
.answer-source a,
.source-table a {
    color: var(--green);
    font-size: 12px;
    font-weight: 700;
}

.result-cta {
    padding: 55px 0;
}

.result-cta-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
}

.result-cta h2 {
    margin-bottom: 0;
    font-size: 34px;
}

.chat-shell {
    width: min(880px, calc(100% - 40px));
}

.suggestions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 18px;
}

.suggestions > span {
    margin-right: 5px;
    color: #73877b;
    font-size: 12px;
}

.suggestions button {
    padding: 7px 12px;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--ink-soft);
    cursor: pointer;
    background: white;
    font-size: 12px;
}

.suggestions button:hover {
    border-color: var(--green);
    color: var(--green);
}

.chat-form {
    padding: 26px;
    box-shadow: var(--shadow);
}

.chat-form label {
    display: block;
    margin-bottom: 10px;
    font-weight: 700;
}

.chat-form textarea {
    min-height: 120px;
}

.chat-form-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-top: 16px;
}

.chat-form-footer > span {
    color: #839188;
    font-size: 11px;
}

.answer-card {
    display: grid;
    margin-top: 24px;
    padding: 30px;
    grid-template-columns: 46px 1fr;
    gap: 20px;
}

.answer-avatar {
    width: 46px;
    height: 46px;
}

.answer-content > p {
    margin: 0;
    color: var(--ink-soft);
}

.answer-source {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid var(--line);
    color: #7f8e85;
    font-size: 11px;
}

.chat-tip {
    margin-top: 25px;
    padding: 20px 24px;
    border: 1px solid #d7ddbd;
    border-radius: 16px;
    background: #fbfcec;
}

.chat-tip strong {
    font-size: 13px;
}

.chat-tip p {
    margin: 4px 0 0;
    color: var(--ink-soft);
    font-size: 12px;
}

.source-intro {
    display: grid;
    margin-bottom: 34px;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.source-intro > div {
    padding: 24px;
    border-radius: 18px;
    background: var(--cream);
}

.source-intro p {
    margin: 5px 0 0;
    color: var(--ink-soft);
    font-size: 13px;
}

.source-table-wrap {
    overflow-x: auto;
    border: 1px solid var(--line);
    border-radius: 20px;
}

.source-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
}

.source-table th,
.source-table td {
    padding: 18px 20px;
    border-bottom: 1px solid var(--line);
    text-align: left;
    vertical-align: middle;
}

.source-table th {
    color: #76887d;
    background: #f4f6f1;
    font-size: 11px;
    letter-spacing: 0.08em;
}

.source-table td {
    color: var(--ink-soft);
    font-size: 13px;
}

.source-table tbody tr:last-child td {
    border-bottom: 0;
}

.source-table td:first-child strong {
    display: inline-grid;
    width: 34px;
    height: 34px;
    margin-right: 8px;
    place-items: center;
    border-radius: 10px;
    color: white;
    background: var(--green);
    font-family: Georgia, serif;
}

.site-footer {
    padding: 30px 0;
    color: rgba(255, 255, 255, 0.62);
    background: #102d22;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 30px;
}

.footer-inner p {
    margin: 0;
    font-size: 11px;
}

@media (max-width: 900px) {
    .hero-grid {
        min-height: auto;
        padding: 90px 0 70px;
        grid-template-columns: 1fr;
    }

    .hero::before,
    .hero-visual {
        display: none;
    }

    .steps-grid,
    .feature-grid {
        grid-template-columns: 1fr;
    }

    .result-title-grid,
    .result-layout {
        grid-template-columns: 1fr;
    }

    .confidence-card {
        max-width: 300px;
    }

    .result-aside {
        position: static;
    }
}

@media (max-width: 680px) {
    .shell,
    .narrow,
    .chat-shell {
        width: min(100% - 28px, 1160px);
    }

    .site-header {
        position: static;
    }

    .header-inner {
        min-height: 68px;
    }

    .brand small,
    .nav a:first-child,
    .nav a:last-child {
        display: none;
    }

    .nav {
        gap: 16px;
        font-size: 12px;
    }

    .hero-grid {
        padding-top: 70px;
    }

    .hero h1 {
        font-size: 43px;
    }

    .hero-actions,
    .result-cta-inner,
    .footer-inner {
        align-items: stretch;
        flex-direction: column;
    }

    .section {
        padding: 65px 0;
    }

    .feature-panel {
        min-height: 320px;
        padding: 34px 28px;
    }

    .form-step {
        padding: 24px 20px;
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .form-submit,
    .chat-form-footer,
    .answer-source {
        align-items: stretch;
        flex-direction: column;
    }

    .form-submit {
        padding: 24px 20px;
    }

    .result-hero {
        padding-bottom: 55px;
    }

    .result-topline {
        align-items: flex-start;
        flex-direction: column;
    }

    .result-card {
        padding: 28px 22px;
    }

    .answer-card {
        padding: 24px 20px;
        grid-template-columns: 1fr;
    }

    .source-intro {
        grid-template-columns: 1fr;
    }
}