:root{--color-bg: #ffffff;--color-bg-alt: #f5f7fa;--color-bg-accent: #eef2f7;--color-ink: #1f2937;--color-ink-soft: #4b5563;--color-ink-muted: #6b7280;--color-primary: #1f3a5f;--color-primary-dark: #152b48;--color-primary-soft: #e7eef6;--color-accent: #b08d57;--color-line: #e2e8f0;--color-white: #ffffff;--color-danger: #b91c1c;--radius: 12px;--radius-lg: 18px;--shadow-sm: 0 1px 3px rgba(15, 23, 42, .08);--shadow-md: 0 10px 30px rgba(15, 23, 42, .08);--maxw: 1080px;--maxw-narrow: 760px;--font-sans: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Noto Sans JP", "Yu Gothic", "Meiryo", system-ui, -apple-system, sans-serif}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:var(--font-sans);color:var(--color-ink);background:var(--color-bg);line-height:1.8;font-size:16px;-webkit-font-smoothing:antialiased}h1,h2,h3,h4{line-height:1.45;color:var(--color-primary);font-weight:700}p{margin:0 0 1em}a{color:var(--color-primary)}img{max-width:100%;display:block}.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:20px}.container-narrow{max-width:var(--maxw-narrow)}.section{padding-block:64px}.section-alt{background:var(--color-bg-alt)}.section-title{font-size:clamp(1.4rem,3.5vw,2rem);text-align:center;margin:0 0 8px}.section-lead{text-align:center;color:var(--color-ink-soft);margin:0 auto 40px;max-width:640px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 28px;border-radius:999px;font-weight:700;text-decoration:none;border:2px solid transparent;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease,background .15s ease;font-size:1rem}.btn-primary{background:var(--color-primary);color:var(--color-white);box-shadow:var(--shadow-sm)}.btn-primary:hover{background:var(--color-primary-dark);transform:translateY(-1px);box-shadow:var(--shadow-md)}.btn-outline{background:var(--color-white);color:var(--color-primary);border-color:var(--color-primary)}.btn-outline:hover{background:var(--color-primary-soft)}.btn-lg{padding:16px 36px;font-size:1.05rem}.site-header{position:sticky;top:0;z-index:20;background:#ffffffeb;backdrop-filter:blur(8px);border-bottom:1px solid var(--color-line)}.site-header__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px}.site-header__brand{font-weight:700;color:var(--color-primary);text-decoration:none;font-size:1.05rem}.site-footer{background:var(--color-primary-dark);color:#ffffffd9;padding-block:32px;font-size:.875rem}.site-footer a{color:#fff}.card{background:var(--color-white);border:1px solid var(--color-line);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-sm)}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}@media (max-width: 640px){.section{padding-block:48px}}.form{display:grid;gap:24px}.field{display:grid;gap:8px}.field__label{font-weight:700;color:var(--color-ink);font-size:.98rem}.field__req{display:inline-block;margin-left:8px;font-size:.72rem;font-weight:700;padding:2px 8px;border-radius:4px;vertical-align:middle}.field__req.is-required{background:#fde8e8;color:var(--color-danger)}.field__req.is-optional{background:var(--color-bg-accent);color:var(--color-ink-muted)}.field__hint{font-size:.84rem;color:var(--color-ink-muted)}.field input[type=text],.field input[type=email],.field input[type=tel],.field input[type=date],.field select,.field textarea{width:100%;padding:12px 14px;border:1px solid var(--color-line);border-radius:var(--radius);font-family:inherit;font-size:1rem;color:var(--color-ink);background:var(--color-white)}.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--color-primary);outline-offset:1px;border-color:var(--color-primary)}.field textarea{min-height:120px;resize:vertical}.field--error input,.field--error select,.field--error textarea,.field--error .choice-group{border-color:var(--color-danger)}.field__error{color:var(--color-danger);font-size:.84rem;display:none}.field--error .field__error{display:block}.choice-group{display:grid;gap:10px;border:1px solid transparent;border-radius:var(--radius)}.choice-group--cols{grid-template-columns:repeat(auto-fill,minmax(200px,1fr))}.choice{display:flex;align-items:flex-start;gap:10px;padding:10px 14px;border:1px solid var(--color-line);border-radius:var(--radius);cursor:pointer;background:var(--color-white);font-size:.95rem}.choice:hover{background:var(--color-bg-alt)}.choice input{margin-top:3px;flex:none}fieldset{border:none;margin:0;padding:0}fieldset legend{font-weight:700;color:var(--color-ink);font-size:.98rem;padding:0;margin-bottom:8px}.form-status{margin-top:16px;padding:14px 18px;border-radius:var(--radius);font-size:.92rem;text-align:left;border:1px solid var(--color-line)}.form-status--sending{background:var(--color-bg-accent);color:var(--color-ink-soft)}.form-status--error{background:#fde8e8;border-color:var(--color-danger);color:var(--color-danger)}