/* =========================================================================
   百香集 · 香材炮制（xcpc）
   页面级排版：炮制总说 / 三大古法 / 炮制对照 / 古法要诀
   ========================================================================= */

/* ---------- 炮制总说 ---------- */
.intro-lead {
    max-width: 900px;
    margin: 0 auto 48px;
    font-size: 15px;
    line-height: 2.2;
    color: var(--ink-2);
    text-align: justify;
}

.purpose-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.purpose-card {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 264px;
    padding: 34px 26px 34px;
    background: var(--card);
    border: 1px solid var(--line);
    text-align: center;
    cursor: pointer;
    overflow: hidden;
    transition: transform .45s var(--ease), box-shadow .45s var(--ease),
                border-color .45s var(--ease);
}

.purpose-card:hover,
.purpose-card.is-open {
    transform: translateY(-6px);
    border-color: rgba(140, 90, 58, .5);
    box-shadow: var(--shadow-hover);
}

.purpose-num {
    position: absolute;
    top: 13px;
    left: 15px;
    font-family: var(--font-deco);
    font-size: 12px;
    letter-spacing: 2px;
    color: var(--ink-3);
}

/* h3 本身即印章造型 */
.purpose-card h3 {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 58px;
    height: 58px;
    margin: 6px auto 16px;
    font-family: var(--font-deco);
    font-weight: 400;
    font-size: 28px;
    line-height: 1;
    letter-spacing: 0;
    color: var(--accent-2);
    border: 1.5px solid var(--accent-2);
    border-radius: var(--r-sm);
    transition: background .4s var(--ease), color .4s var(--ease),
                transform .4s var(--ease);
}

.purpose-card:hover h3,
.purpose-card.is-open h3 {
    background: var(--accent-2);
    color: var(--paper);
    transform: rotate(-4deg);
}

.purpose-card > p {
    font-size: 13.5px;
    line-height: 1.95;
    color: var(--ink-2);
    text-align: justify;
}

/* 图例提示 */
.purpose-card::after {
    content: "— 图例";
    position: absolute;
    left: 0;
    right: 0;
    bottom: 14px;
    font-family: var(--font-deco);
    font-size: 11.5px;
    letter-spacing: 4px;
    color: var(--accent);
    opacity: .8;
    transition: opacity .25s var(--ease);
}

.purpose-card:hover::after,
.purpose-card.is-open::after { opacity: 0; }

.purpose-figure {
    position: absolute;
    inset: 0;
    z-index: 2;
    background: var(--card);
    opacity: 0;
    visibility: hidden;
    transform: scale(1.05);
    transition: opacity .4s var(--ease), transform .5s var(--ease),
                visibility .4s;
}

.purpose-figure img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.purpose-figure p {
    position: absolute;
    left: 14px;
    right: 14px;
    bottom: 14px;
    padding: 8px 10px;
    background: rgba(246, 239, 226, .94);
    border: 1px solid rgba(140, 90, 58, .32);
    font-family: var(--font-deco);
    font-size: 12.5px;
    line-height: 1.7;
    letter-spacing: 1px;
    color: var(--ink);
    text-align: center;
}

.purpose-card:hover .purpose-figure,
.purpose-card.is-open .purpose-figure,
.purpose-card:focus-visible .purpose-figure {
    opacity: 1;
    visibility: visible;
    transform: none;
}

/* ---------- 三大古法 ---------- */
.craft-switch {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 34px;
}

.craft-jump {
    padding: 9px 28px;
    font-family: var(--font-title);
    font-size: 15px;
    letter-spacing: 3px;
    color: var(--ink-2);
    background: transparent;
    border: 1px solid var(--line);
    cursor: pointer;
    transition: color .25s var(--ease), background .25s var(--ease),
                border-color .25s var(--ease), box-shadow .25s var(--ease);
}

.craft-jump:hover { color: var(--accent); border-color: var(--accent); }

.craft-jump.is-active {
    color: var(--paper);
    background: var(--accent);
    border-color: var(--accent);
    box-shadow: var(--shadow-2);
}

.craft-block {
    display: grid;
    grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
    margin-bottom: 30px;
    background: var(--card);
    border: 1px solid var(--line);
    overflow: hidden;
    transition: box-shadow .45s var(--ease);
}

.craft-block:last-of-type { margin-bottom: 0; }
.craft-block:hover { box-shadow: var(--shadow-2); }

.craft-block.is-reverse { grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr); }

.craft-media {
    position: relative;
    min-height: 380px;
    margin: 0;
    overflow: hidden;
    background: var(--paper-alt);
    border-right: 1px solid var(--line);
    cursor: zoom-in;
}

.craft-block.is-reverse .craft-media {
    order: 2;
    border-right: 0;
    border-left: 1px solid var(--line);
}

.craft-media img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .9s var(--ease-out);
}

.craft-block:hover .craft-media img { transform: scale(1.04); }

.craft-body { padding: 44px 48px; }

.craft-tag {
    display: inline-block;
    margin-bottom: 14px;
    padding: 3px 14px;
    font-family: var(--font-deco);
    font-size: 12.5px;
    letter-spacing: 3px;
    color: var(--paper);
    background: var(--accent);
    border-radius: var(--r-sm);
}

.craft-body h3 {
    margin-bottom: 12px;
    font-family: var(--font-title);
    font-weight: 400;
    font-size: 30px;
    letter-spacing: 6px;
    color: var(--ink);
}

.craft-principle {
    margin-bottom: 22px;
    font-size: 14px;
    line-height: 2;
    color: var(--ink-2);
    text-align: justify;
}

.craft-steps {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 10px;
    margin-bottom: 22px;
    counter-reset: step;
}

.craft-steps li {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px 6px 8px;
    font-size: 13px;
    color: var(--ink-2);
    background: rgba(239, 228, 208, .45);
    border: 1px solid var(--line);
    border-radius: 999px;
    counter-increment: step;
}

.craft-steps li::before {
    content: counter(step);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    font-size: 11px;
    line-height: 1;
    color: var(--paper);
    background: var(--accent);
    border-radius: 50%;
}

.craft-herbs {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
}

.craft-herbs-label {
    margin-right: 4px;
    font-family: var(--font-title);
    font-size: 13px;
    letter-spacing: 3px;
    color: var(--accent);
}

.craft-tip {
    padding: 10px 16px;
    font-size: 13px;
    line-height: 1.9;
    color: var(--accent);
    background: rgba(140, 90, 58, .07);
    border-left: 3px solid var(--accent);
}

/* ---------- 炮制对照 ---------- */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 10px;
    margin-bottom: 32px;
}

.filter-btn {
    padding: 7px 22px;
    font-size: 13.5px;
    letter-spacing: 2px;
    color: var(--ink-2);
    background: transparent;
    border: 1px solid var(--line);
    cursor: pointer;
    transition: color .25s var(--ease), background .25s var(--ease),
                border-color .25s var(--ease), box-shadow .25s var(--ease);
}

.filter-btn:hover { color: var(--accent); border-color: var(--accent); }

.filter-btn.is-active {
    color: var(--paper);
    background: var(--accent);
    border-color: var(--accent);
    box-shadow: var(--shadow-2);
}

.filter-count {
    margin-left: 8px;
    font-size: 12.5px;
    letter-spacing: 1px;
    color: var(--ink-3);
}

.dz-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 18px;
}

.dz-card {
    position: relative;
    padding: 22px 18px 20px;
    background: var(--card);
    border: 1px solid var(--line);
    border-top: 2px solid var(--accent);
    text-align: center;
    transition: transform .35s var(--ease), box-shadow .35s var(--ease);
}

.dz-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-2);
}

.dz-card.is-hidden { display: none; }

.dz-card.card-in { animation: dzIn .45s var(--ease); }

@keyframes dzIn {
    from { opacity: 0; transform: translateY(10px) scale(.98); }
    to { opacity: 1; transform: none; }
}

.dz-name {
    display: block;
    margin-bottom: 7px;
    font-family: var(--font-title);
    font-size: 21px;
    letter-spacing: 3px;
    color: var(--ink);
}

.dz-method {
    display: inline-block;
    margin-bottom: 10px;
    padding: 1px 10px;
    font-family: var(--font-deco);
    font-size: 12px;
    letter-spacing: 1px;
    color: var(--accent-2);
    border: 1px solid rgba(166, 61, 47, .35);
    border-radius: 999px;
}

.dz-fire {
    padding-top: 10px;
    font-size: 12.5px;
    line-height: 1.8;
    color: var(--ink-2);
    border-top: 1px dashed var(--line);
}

.dz-effect {
    margin-top: 7px;
    font-size: 12.5px;
    line-height: 1.8;
    color: var(--accent);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1180px) {
    .purpose-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .craft-block,
    .craft-block.is-reverse { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
    .craft-body { padding: 34px 34px; }
    .craft-body h3 { font-size: 26px; }
    .craft-media { min-height: 340px; }
    .dz-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 900px) {
    .intro-lead { font-size: 14px; margin-bottom: 36px; }
    .purpose-grid { gap: 18px; }
    .purpose-card { min-height: 0; padding: 28px 22px 30px; }

    .craft-block,
    .craft-block.is-reverse { grid-template-columns: 1fr; }
    .craft-media {
        order: 0 !important;
        aspect-ratio: 16 / 10;
        min-height: 0;
        border-right: 0;
        border-left: 0;
        border-bottom: 1px solid var(--line);
    }
    .craft-block.is-reverse .craft-media { border-left: 0; }
    .craft-body { padding: 28px 26px 32px; }
    .craft-body h3 { font-size: 24px; letter-spacing: 4px; }
    .dz-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
}

@media (max-width: 600px) {
    .purpose-grid { grid-template-columns: 1fr; }
    .purpose-card h3 { width: 52px; height: 52px; font-size: 25px; }
    .craft-switch { gap: 8px; }
    .craft-jump { padding: 8px 20px; font-size: 14px; }
    .craft-body { padding: 24px 20px 28px; }
    .craft-steps li { font-size: 12.5px; }
    .filter-btn { padding: 6px 16px; font-size: 13px; }
    .filter-count { width: 100%; text-align: center; margin: 4px 0 0; }
    .dz-name { font-size: 19px; }
}